Merge pull request #6 from alexcodreanu86/user

added routes for post
can now create posts from form and view the newly created post on the show page.
Merge pull request #7 from alexcodreanu86/posts

can now create posts from form and view the newly created post on the sh...
Tests for sign up and sign in created, along with test to ensure the errors are displaying when the user makes a mistake.
fixed some conflicts in spec_helper.rb