ENH: Improved filename/line number reporting in error message.  Macro invocations now chain up the error message.

ENH: Moved ExpandListVariables out of individual commands.  Argument evaluation rules are now very consistent.  Double quotes can always be used to create exactly one argument, regardless of contents inside.

link lines, which affects external libraries pulled up from deep within
the dependency tree. Fixed by preserving order everywhere.

ENH: Added reference to Copyright.txt.  Removed old reference to ITK copyright.  Changed program name to CMake instead of Insight in source file header.  Also removed tabs.

Add option of TRY_COMPILE to store the output of compilation so that if the output fails you can display it or store it in the file

Couple of changes: cache variables now have a map of properties. ADVANCED and HELPSTRING are now properties of cache variable, IsAdvanced is gone, so is GetCacheEntry, since cache entries are now all private. To access them, you use the iterator. -ADVANCED cache entries are gone and are replaced by the property of cache variables. The cache file still looks the same, but the -ADVANCED cache entries are created when writing file. MarkAsAdvanced and VariableRequires are fixed. So are curses gui and wizard

ERR: Fixes for comeau compiler.  NULL is a pointer of type void*, and cannot be compared directly with other pointer types.  We use 0 instead.