stubbed out user login
add session helper file
add user login and authentication helpers
setup login route logic
add logout method
add signup method
fixed merge conflict
Merge branch 'master' into add_sessions
required session_helper
add logged_in? method
submit/comment button not available to guest user
add current_user method to helper
updated view to reflect whether user is logged in
stubbed out user page route
fix new topic does not have author bug
add author's email alongside topic title
fix new comment does not have author bug
add user email alongside comments
add authenticate helper so that guest is denied access to new_post page
Merge branch 'master' into add_sessions