Fix regular expression in setup.py to avoid -r puppet/modules/brainiak/files/requirements.txt' in install_requires
Remove print command used for debugging
Merge pull request #25 from rodsenra/master

Add -r regex to setup.py to fix broken installation
Cleaner version of implementation using same regex to ahndle -f or -r
Merge pull request #26 from rodsenra/master

Cleaner version of implementation using same regex to handle -f or -r
Add truth value test

Added both __nonzero__ and __bool__ for portability.