Ignore style tags with data-premailer=ignore tag
Support to ignore some CSS blocks in both Nokogiri and Hpricot.
Merge remote-tracking branch 'bookwyrm/master' into media-query-fix

Conflicts:
	lib/premailer/premailer.rb
Fix (somewhat) carriage returns incorrectly encoded as decimal as well as hex.

This should help people stuck with #81 and #92
Correctly check the adapter to pick the style tags for data-premailer="ignore" style attributes.
Hack the CDATA wrapper out of <style> tags