CYB-241 - Likes/Dislikes not appearing on detail view of a gallery item

https://jira.ets.berkeley.edu/jira/browse/CYB-241
CYB-268 - Front-end: Users should not be able to like their own items

https://jira.ets.berkeley.edu/jira/browse/CYB-268
Merge pull request #158 from christianv/CYB-241

CYB-241 / CYB-268 - Likes/Dislikes not appearing on detail view of a gallery item