Catch Cython/weave compiler error on Windows (#353)
Catch Cython/weave compiler error on Windows (#353)

If Cython or weave cannot find a working compiler on Windows, one
error than can occur is ValueError: Symbol table not found, generated
by numpy/distutils/mingw32ccompiler.py. This commit catches this
error and treats the compiler as non-functional, logging the occurence
as a DEBUG log message.
jmuhlich/pysb,alubbock/pysb,pysb/pysb,johnbachman/pysb,LoLab-VU/pysb,LoLab-VU/pysb,johnbachman/pysb