multiple changes

update to jade 0.35.x
remove injecting of sources (jade do this now)
async extend and include with webpack resolving and pre-loaders
Automatically detect includes

Automatically detect includes which must be inlined, reference the
remaining
fixes #2
add "require" to the list of globals

need to wait until visionmedia/jade#1222 is published...
fixes webpack/webpack#124
Update jade version fixes #3
Merge branch 'dev'

Conflicts:
	index.js
	package.json