added unit test for csv_parser. Refactored the Parser model in the process
added additional parser tests to student, parser, and assignment spec
added an access to student through enrollment test
Merge pull request #31 from zrivest/student_graph_pages

Student graph pages
unit tests for models and migrations
Merge pull request #32 from zrivest/unit_testing_models_and_migrations

Unit testing models and migrations
fixed student factory girl
css and form validations
fixed merge conflicts
Merge pull request #34 from zrivest/css_and_maintenance

Css and maintenance
Merge branch 'student_graph_pages'