Merge pull request #1036 from woniesong92/develop

#1035 - fix synchronizeVideosOfLateGuest

Tagging so it will rev

Fix $LOG_LEVEL env var, and add $LOG_FILE env var

Tagged from towtruck.mozillalabs.com branch for deployment

update

Fix #708, show source at /server-source. Add content-types to some re…

…sponses. Don't write to log when rotating.

More changes for the live help feature on the site

More changes for the live help feature on the site

updating some styles

Fix a small issue in the hub (hub-only deployment)