added sub-chapter tests, user tests and added validation to user model
added validation and test for sub_chapters
removed code_snippet_spec
Merge branch 'master' of https://github.com/nealcpeters/infobytes into testing
uncommented line in spec_helper.rb
Merge pull request #34 from nealcpeters/testing

Testing
Merge branch 'master' of https://github.com/nealcpeters/infobytes into codesnippet
merged with Amara's tests