fixing test file name that I messed up
Merge pull request #38 from emirose/rename_test_file_name

fixing test file name that I messed up
Add shoulda gem for testing
Add school tests and fix bug in enrollments_for_year
Merge pull request #39 from arbylee/school_tests

School tests
Replaces stock README with barebones installation instructions
Merge pull request #40 from faitswulff/update-readme

Replaces stock README with barebones installation instructions