Update README.md

Fixed typos
Merge pull request #80 from brice/master

Update README.md
Add e4x and wrap_line_length options
Merge pull request #82 from ckknight/master

Add e4x and wrap_line_length options
Merge branch 'master' into jsbeautifyrc

Conflicts:
	js_formatter.py
use os.sep rather than "/" for .jsbeautifyrc pathing.
switched to proper argument coalescing.

The weird coercion-esque behavior was starting to make it feel like javascript in here.
added option to control utilization of jsbeautifyrc files
gave the readme a little love (it needs more still)
fixed anchor link
handle invalid .jsbeautifyrc json files.

If an rc file is invalid JSON an error message is displayed and the formatting is aborted (it really just bombs out).
Merge pull request #1 from jdc0589/jsbeautifyrc

Update from upstream