Merge pull request #12 from hamberguesa/tweet

new tweet form works
added helper to find current_user and reworked controllers to use it
Merge pull request #13 from hamberguesa/current_user_helper

added helper to find current_user and reworked controllers to use it
added redirect helper and modified controller
Merge pull request #14 from hamberguesa/redirect_helper

added redirect helper and modified controller
ignore this push