+ Add *~ files made by editors such as gedit to the ignore list.
+ Add doxygen macros to top level import for easier access.
+ Add project root as an explicit value to the .cmake file.
+ Add future import of with statement for Python 2.5 compatibility.
+ Add future import of with statement for Python 2.5 compatibility.
+ Add future import of with statement for Python 2.5 compatibility.
+ Change iterator syntax to be compatible with Python 2.5.
+ Add future import of with statement for Python 2.5 compatibility.
+ Change Exception syntax to be compatible with Python 2.5.
+ Add future import of with statement for Python 2.5 compatibility.
+ Change Exception syntax to be compatible with Python 2.5.
+ Change 'documentation' metadata property to be a list of strings.
+ Change Exception syntax to be compatible with Python 2.5.
+ Change iterator syntax to be compatible with Python 2.5.
+ Add backwards compatible support for CMAKE_MODULE_PATH (inverse of
functionality in Rex).
+ Add support to convert 'alias' to  EnvironmentVariable action.
+ More clearly distinguish 'export' and 'alias' commands from other
actions that just happen to start with 'export' or 'alias'
+ Properly escape { and } in string formatting.
+ Update appendenv, prependenv and setenv support in csh.  In TCSH
referencing an environment variable which doesn't exist results in an
error (unlike bash).  We protect against this by wrapping in an if/else
clause.  Lame.
+ Update initialiser of Python CommandInterpreter to pass through the
correct arguments to the base class.
+ Better handling of os.environ in the _expand method.  os.environ is
not a 'real' dict and so does not work with the ** syntax in the call to
safe_substitute.
+ Add future import of with statement for Python 2.5 compatibility.
+ Change Exception syntax to be compatible with Python 2.5.
+ Add GitRezReleaseMode based on previous implementation by Black
Ginger.
+ Make sure the .pyc files are also installed (otherwise why are we making them?).
+ Add missing import.
+ Ensure tag operations use version as a string, not an object.
+ Add missing self. statement.