adding crunch-delta

script for after effects that creates a comp that lossily reduces the
difference between the pixels of sequential frames. I use this a lot
with codecs that (otherwise) losslessly store deltas, in particular
QT-Animation and animated GIFs
proper...ish build script
removing unnecessary stuff from jslint global decls
crunch-usage, a script that will freeze video (for delta compression)
when outside user-specified ranges. used for archiving lossless video
that only has small parts of it used in aep files
don't need a timecode parsing function as AE provides currentFormatToTime
auto-suggest the video's entire time range
crunch-delta use existing folder if present
some off-by-one fix i never committed but presume was necessary
safe-for-web an image into equal-sized tiles. you’re supposed to be able to do this with layer slices + save for web but documents with large dimensions (32K-ish) don’t work with it