Themes and terminal.css:  Moved the Ubuntu @font-face stuff from Gate One's global themes into terminal.css.
terminal.css:  Added a bunch of '.✈font_*' classes that assign various font faces.  This is to allow users to switch terminal fonts on-the-fly without having to have the font chosen by the theme.
Themes:  Changed the prefs panel stuff to make the preference selection appear on the right instead of the left.  This will allow for having a variable-width panel without having the selection list change location every time it grows/shrinks.
terminal.js:  Moved the logic that detects a terminal's EM dimensions down a bit inside of GateOne.Terminal.newTerminal().  This ensures a more accurate initial value (it gets overwritten by sendDimensions() a little later 99% of the time anyway).
terminal.py:  Fixed a bug where you'd end up with IndexError exceptions if the terminal's EM dimensions were set incorrectly when cat'ing an image.
app_terminal.py:  There's no longer a delay when sending Ctrl-L to a dtach'd terminal that has just been resumed.  The Ctrl-L is now sent immediately.
termio.py:  There is no longer a delay when calling resize() immediately after a Multiplex instance is spawned.