Added CFLAGS option and exception on dlsym crash.
removed old generated files and update git ignore list.
Added buildDirectory and started to fix segfaults.
Fixed segfault caused by variadic function py_callback.
Code cleanup.
Fixed segmentation fault in generated bison code.
Fixed compilation warning and removed useless LEO comments.
Code cleanup in pybison's python file.
Makefile cleanup and removed generated pxi file.
Fixed segfault on 32 bit arch (wrong place for refcount increment).
Improved py_callback exception handling and code cleanup.
Cleanup in pyrex code to make it compatible with Cython.
Code cleanup and applied pyflakes' suggestions.
Improved exception handling and moved bisonToParser to own file.
Improved error reporting facilities.
Fixed ignored KeyboardInterrupt exception.
Updated exception reporter to new way of catching exceptions.
Finished exception handling (successfully pass through of exceptions).
Restructured modules, fixed intra-package imports and applied pep8.
Set default node class to BisonNode instead of None.