commands.py: raise the exception instead of returning is if --disable-multiprocessing is given.
Web: Disable @title and @doctype for non-HTML documents.
Fix core tests for Python 3 (actually imported + fixes).
Fix bug that caused commands like '@google google google google translate' to be valid. Closes GH-19.
Fix c23f25545f5 for Python 2.
Remove debug output.
Fix syntax error in tests when run with Python 3.1 and 3.2.