updated to python 2.7 & 64 bit libs for os x 10.9
support external editors

(by reloading from disk when a file has been modified while the app was
in the background)
auto-smartquotes in 10.9 were preventing creation of strings in the editor
zooming is now relative to the center rather than corner of graphic
empty output panel at start of each run
tidied up the zoom control
added command line tool to run scripts externally
installing the tool in SharedSupport/bin
tool now echoes the script's stdout
added export and display options to tool
made window autosave ... less stochastic
made esc a synonym for command-period

(a bit more intuitive when people are panicking trying to leave
full-screen mode)
replaced simplexmlrpcserver with something simpler
fixed termination behavior when using --live
added animated gif export
added gifs to movie export gui

also, export settings are now retained between runs
dropped QTKit dependency and moved video export to objc
moved file i/o onto background threads for export

also updated the progress bar logic to work asynchronously
the document class lives in its own file now
ignore