Changes to File Saving

Uploaded video files are now saved in OPENSHIFT_TMP_DIR, while the
converted webm files are saved in OPENSHIFT_DATA_DIR. After conversion, or
even after failed conversion, uploaded video files are deleted.
Curved Mute Button & Removed Control Hover
Two New Video Player Features

* You can now seek times in a video with the time bar
* There is now embed code in the player, although it could be more featureful...