Merge pull request #15 from alexcodreanu86/user

User
created nav bar that allows signin, signup, logout, profile, and home. Changes based on session. Deleted excessive devise links.
Merge pull request #16 from alexcodreanu86/associations

created nav bar that allows signin, signup, logout, profile, and home. C...
A user can create an answer and post and view their profile. Tests are passing for the all implementations in the current state of the program for users, answers and posts.