More process -> Console, faster updating progress bars
Import minify function from uglifyjs (BSD)
Report progress during minification
Support option to minify together or not

It makes almost no difference to the final download size though
Be more aggressive about updating the console; don't just rely on the timer
Remove explicit minification timing
Fix some progress sequencing issues
More accurate progress from minify
toString on Progress
Fix bug in state computation
Better progress dump
Fix total state update in Progress
Don't double-count bodyStreamLength
A few more cleanups