matplotlib Code

code reorganization to remove active call to 'get_data_path' from otherwise static list of rcdefault values

split dependency check from option validation of usetex

split dependency check from option validation of ps_distiller

cosmetic cleanup of option validation code

simplified option validation using the generic ValidateInStrings where possible

split setting of verbose mode from option validation code

refactored matplotlibrc-file parser

removed redundant color character definitions from axis.py

Add Stefan's latest lsys code

added better support for finding the config dir; added environment variable MPLCONFIGDIR