Add testcase for cimport+alias+subclass bug

Cython/Debugger/Cygdb.py: Source .cygdbinit file

added __version__ to the cython namespace

Fix cygdb argument parsing

The "--" needs to be put before any gdb args so that optparse doesn't think that they're cygdb args.

.gitignore: Ignore *.egg and *.egg-info

Multiple fixes to array.extend()