changed Gemfile to exclude debugger
Fixed signup route
Tests for loggin in/signing up pass
add test to check for invalid logins
modify Sessions controller to handle login and set error status on invalid login
fix .gitignore
add error display to the new session template
Merge pull request #1 from AlexSYanai/registration

Registers new user to databse.
fixes minor merge conflict in sessions spec
Session spec works
resolves sessions controller conflict that didn't previously save
update migration fields and references, refactor polymorphic association on Votes
update models to correctly reference other models
run migrations, update schema
Merge branch 'database-fix' of https://github.com/AlexSYanai/zack-overflow into database-fix