tickets#show: Uniquify photos before listing them

This may resolve an issue with photos being listed incorrectly.
Merge branch 'upstream-master' into 'master'

This updates things.
Replace double quotes with single quotes in the Gemfile.

This is the standard in the rest of the file, so I've replaced double
with single.
Some indentation changes to the application layout.
Add some more whitespace to make things more fluid.
Merge pull request #7 from kryestofer/master

Merge `kryestofer:master` into `WLCSC:master`