Deleted spurious "CSPS"
Fixed observable for Bid by changing from mistaken "Bax"

For some reason the mBid observable in each of these files was
actually listed as Bax.
Documentation for test_*.py
Removed (unused) compare_odes from test_albeck_models.py
Rewrote test_models.py to use a nose test generator
Minor comment revision
Added doc pages for test functions/classes
Fixed path to .tsv data files
Fixed spelling: "Apoptotsis"!
Added/revised docs for tests and for introduction
Merge remote-tracking branch 'jmuhlich/master'
Grammatical fix of comment
Minor comment fix
Grammatical fix
New tests module including tests of Lopez models
Renamed test_models to test_models_net_gen
Updated docs to new tests module location

And also added a test_lopez_models.rst doc file.
Minor comment revisions
Augmented the intro with new details on Git, etc.

Added bit on contributing, added links to GitHub pages, etc.
Fixed title underline length