user can create a review
user can edit his reviews
addressed comments
Resolve merge conflict & merge in master
Merge pull request #16 from LaunchAcademy/create_an_index_page

Addressed comments
addressed helen's comments
fixed merge conflict
Delete users works, hooray
Merged in master branch with reviews
Merge branch 'master' into admin
WIP admin functionality exists, the admin only user index and delte ability is complete, reviews admin index/delete almost complete, gems delete not started