EVERYTHING:  Everywhere possible I have stopped using the #gateone (aka goDiv) container in any and all CSS styles.  Instead all classes are being prefixed with the ✈ character.
gateone.js:  Added some error-checking logic to GateOne.Utils.getEmDimensions() that will make sure that the sizingDiv gets cleaned up in the event that something goes wrong in the middle of processing.
Logging Plugin:  Fixed a Python 3/Tornado 3.0-specific bug where you would get a TypeError when it tried to generate a playback template.
SSH Plugin:  Fixed a bug where the short_hash() function wasn't working properly in Python 3.
Also a bit of code cleanup all-around (thanks PyFlakes!).