Make /login scale based on screen size.
Merge login and signup CSS and make signup page responsive also.
Only use scrollbars when the content is long enough to require one.
Sort cleanup.
Merge branch 'brendanlong-make-login-page-responsive'
Merge pull request #11 from brendanlong/only-use-scrollbars-when-needed

Only use scrollbars when the content is long enough to require one.
move common method favicon to base_presenter