CoffeeScript build environment
First CoffeeScript file
Small fix
Switched to a real Makefile.

Targets:
* all --- extension javascript in build/
* rsakey --- generate key.pem if not there
* crx --- compile gplusblacklist.crx Chrome extension
Added "make clean"
Changed CoffeeScript compiling to have errors on screen
Rewrote everything to CoffeeScript