Merge pull request #1 from khushkaran/master

Added devise gem to fix warden name error
problem model added
Changed problems to requests, added spec
Added requests model, controller, index
Can create requests
Display requests
Merge pull request #2 from khushkaran/teacher

Teacher Feature Monday Week 1
timestamp added to requests
First ever merge as a group
Merge pull request #3 from alexgaudiosi/master

Added problems model
Added Navbar and front page prototyping content