created tests for answers
added migrations for answers
added answer model and updated question model assoc w/ answer
added answer controller and new view
modifed questions view to incorporate answers
included restful resources for answers
added answer form and functionality to user page

the form to create a new answer is on the page for that particular question
updated answer/question controllers accordingly
included UserHelper
added better_errors gem
removed commented code
Merge pull request #5 from csain/answer_question

Answer a question