UC-90 Made some changes to update mobile for new FB

This mostly amounted to making sure the newest JS SDK was being loaded and removing some cruft.

Also updated to current style guidelines.

https://wikia-inc.atlassian.net/browse/UC-90
Getting this error in the js console:
```js
Uncaught TypeError: Cannot read property 'src' of undefined
```
It seems like there's some subtly here with context and when ```this``` is being evaluated. It should be the script tag during the onerror event, but I think it's trying to evaluate ```this``` early for some reason. Idk, javascript contexts are tricky. Maybe @lizlux knows what's going on.