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)