Merge pull request #5 from Onikoroshi/Generate_Problems

Generate problems
Added very basic authentication for Users, limiting those who are NOT Teachers to viewing and taking Exams.
Implemented most Authentication features. Having an issue with check_boxes, but I'm working on it.
saving
adding gitignore
Finished up Authentication logic.
Merge pull request #7 from Onikoroshi/Authenticate

Finished up Authentication logic.
tried changing to postgresSql
Merge pull request #8 from Onikoroshi/change_db

tried changing to postgresSql
Merge pull request #10 from Onikoroshi/master

fixed issue 9