change isbn schema plan
remove ratings from reviews in schema plan
one book per cover
Added owner_id to Book, and updated Book model
added subscriptions model
updated models and added validations
added a few tests to model
Merge branch 'master' of github.com:Rails-Summer-Project-Noah-and-Matt/Library-Application
removed tests from subscription model
updated tests
Merge pull request #47 from Mattsface/update_schema

Added subscription model
Merge branch 'master' of github.com:Rails-Summer-Project-Noah-and-Matt/Library-Application
migrate isbn for issue 48
change readme to reflect issue 48
validate isbn lengths
added review model
make isbn's strings
Merge pull request #50 from Mattsface/reviews

added review model
added isbn10 and isbn13 views & validations

passing all tests, 100% simplecov.
Merge branch 'master' of github.com:Rails-Summer-Project-Noah-and-Matt/Library-Application