v2013.08.06
	- Fixed a bug where the Scan Chains using STIL "Pseudo" inputs and outputs were causing
	  compile errors on the IGXL platforms due to empty scan chain definitions.
	  	
v2013.06.27
	- Fixed a bug where the STIL reader wasn't handling macro call within a macro or procedure properly.
	
v2013.06.03
	- Fixed a bug where busses ending with a digit were being aliased to existing alias names.
	
v2013.05.23
	- Fixed a bug where the STIL reader wasn't propagating all the states of pins in a STIL
	  "Condition" statement.
	  
v2013.05.08
	- Fixed a bug where the 'UserKeywords' block was using TIL defined keywords "ScanChainGroups"
	  and "ActiveScanChains"
	  
v2013.03.27
	- Fixed a bug where Bidir timing for the Verigy writer was not turning off the drivers
	  when switching between drive and compare.
	  
v2013.03.19
	- Fixed a bug where WGL scan cell bus indicies were of an irregular format.
    
v2012.12.04
	- Fixed a bug where the timeset names for the Credence writer were output incorrectly.
	
v2012.08.20
	- Fixed a bug where the relative timing equations were rounded using the 93k writer.
	- Added support for the 'ActiveScanChains' and 'ScanChainGroups' in the IEEE_1450.1
	  extension specification.
	  
v2012.06.15
	- Fixed a bug where a WGL pattern has an input state character of 'X' on an Input only
      signal, and the user is using 'Half-Mode'.
      
v2012.05.25
	- Fixed a bug where signals present in Macro or Subroutine definitions were not being
	  added to the default signal list.
	- Fixed a bug where UserKeyWords definitions were not be parsed correctly when used in
	  a 'Stil Statement' context.
	
v2012.04.30
	- Added parser support for 'userDefined' blocks within the signal attributes block.
	
v2012.04.24
	- Fixed a bug where intermixed repeat(\r) and join(\j) statements were causing a
	  parse error.
	- Fixed a bug where multiple Fixed(F) or Condition(C) statements inside a macro or
	  procedure was causing a parse error.	
		 
v2011.12.27
	- Fixed a bug that was causing Flex and Ultra flex pattern files in 2x modes to
	  have the dual pattern data mis-aligned. 
      
v2011.11.14
	- Added support for letting users force a signal direction using the Signal Editor.
	  This new feature also works when using a signal file.
	- Fixed a bug that was unique to removing a differential pin on an ultraflex writer.

v2011.11.01
	- Added support for forcing the timing mode chosen by the user in the options menu. This
	  feature is currently only available for the Ultraflex writer.
	- Added support for differential signals in the Ultraflex writer. The new feature will
	  allow users to remove one of the differential pairs from the output pattern.
	- Added a check for a minimum number of cycles output to a pattern file. If the minimum
	  number is not reached, the user will see a warning message in the output.
	  
v2011.09.22
	- Added support for the Vanguard IMS writer.
   
v2011.06.02
	- Restructured the Waveform Viewer to fix speed and space issues, along with unforeseen
	  behavior when showing scan or expanded scan patterns. Also added a 'Waveform_Viewer' 
	  writer which allows VectorPort to be used as a standalone WGL or STIL waveform viewer.
	  
v2011.05.25
	- Fixed a bug that was causing scan patterns to not scroll in the viewer.
	- Fixed a bug in the ETS writer that was causing an exception when attempting
      to ungroup all signals if the force Upper/Lower case option was selected.
         
v2011.05.18
   -  Fixed a memory leak when importing very large pattern files.
   
v2011.04.28
   -  Fixed a bug that was causing the EVCD writer to miss output events.
   -  Fixed a bug in the STIL writer that was causing an exception when scan chains
	  were missing input or output signals in the scanchain definition.
	     
v2011.02.23
   -  Fixed an error in the mapping table that was not allowing a 'XX' set of characters for
      the igxl_ultra writer. This set of characters is only valid in dual 2x mode.
   -  Fixed a parse error in the STIL reader that wasn't allowing the 'V' character.
   -  Fixed a bug that was causing the STIL reader to hang when encountering a 'pseudo' keyword.

v2010.12.23
   -  Added a STIL writer to the current list of writers. This feature will enable users to convert
      existing WGL or STIL input files to STIL output in scan or flattened format.
   -  Added a lastInputDir global variable that is used to open the last directory chosen by the users.
      The new behavior will be to open the 'InputDir' directory when initially choosing files, then
      all subsequent file selecting will use the last directory accessed.   

         
v2010.10.18
   -  Flattening patterns with very deep scanchains will no longer throws an 'Out of Memory' exception.

  
v2010.04.12
   -  Wgl scanchains which are defined but not referenced are ignored if the scanstate is referencing scanchains instead of scancells
   -  Only defining Wgl scanchains with input signals no longer throws an exception


V2010.03.11
   -  Added option to reverse the order that Wgl scan states are input into or output from a device--necessary for some Cadence Encounter files


V2010.02.08
   -  Wgl scan chains without input signals now being parsed correctly


V2010.01.20
   -  IGXL and IGXL_Ultra writers now have option of writing out equations for timesets and generating a spec sheet
      Spec categories are equal to the Wgl expression sets and STIL categories
   -  Wgl names with escaped characters now supported
   -  IGXL writers (J750 Extended and Flex Single modes only) now have the option to expand or preserve, loops from Wgl and STIL files
      This option is good for Wgl pattern and subroutine blocks along with STIL pattern blocks (STIL subroutine loops expanded out)
      By default, four nested loops are allowed with a max loop count of 65535 (all loops are loopA)
      

V2010.01.14
   -  Keyword skip in Wgl now properly handled with a comment being written to pattern
   -  Fixed option in Wgl and STIL so that include files were properly parsed


V2009.12.03
   -  Added support for Wgl complement surround
   -  Fixed issue whereby some compare strobes placed at the first don't care edge instead of compare low or compare high
   -  2X mode for UltraFlex had incorrect second state character
   -  Signals that are removed using signal editor are now properly removed


V2009.11.30
   -  Fixed bug with Wgl reader whereby bidir signalgroups with mixed states were not being parsed correctly
   -  Corrected display issue with some waveforms


V2009.11.13
   -  Added Advantest T2000 writer (does not support scan option)
   -  IGXL writer now consists of J750 and Flex
   -  IGXL_Ultra writer now consists of UltraFlex
   -  VectorPort will now recognize 2X and MCG type STIL waveforms and convert them into 2X or MCG IGXL edgesets
   -  A message will be displayed if all waveform definitions for a signal do not match a desired tester format, and the most appropriate format will be chosen