Merge branch 'master', remote-tracking branch 'parent/master'
make 500 error page slightly more friendly #45
add Confused Alligator to other error pages also #45
tweak styling, fix typos, add back link #45
tweak style a bit more #45
extract styles to errors.css and add image files to repo #45
add clipart originator usernames to CONTRIBUTORS #45
move errors.css to assets and make it precompile #45
Merge pull request #199 from supremebeing7/friendly_error_pages

Friendly error pages