Add student_key model.
Merge branch 'master' of https://github.com/isenseDev/rSENSE into student-keys
Actually add student_keys model.
Add student keys.
Manual Entry, File Upload for user with key.
Student key upload data test.
Merge branch 'master' of https://github.com/isenseDev/rSENSE into student-keys

Conflicts:
	test/integration/upload_data_test.rb
Rename Student Keys to Contrib Keys.
Merge pull request #1131 from NatTuck/student-keys

Student keys