Add TOC-support to redcarpet.rb
Changes suggested by bobthecow
Redcarpet test case for :with_toc => true
Make Item#raw_filename available on text items
Reduce Sass filter dependencies

Use item.raw_filename instead of item[:content_filename] to prevent Sass filter
from creating a dependency on every item in the site.
Merge pull request #306 from gpakosz/reduce_sass_filter_dependencies

Reduce sass filtered items dependencies
Merge branch 'master' of git://github.com/dwoll/nanoc into dwoll-master

Conflicts:
	lib/nanoc/filters/redcarpet.rb
	test/filters/test_redcarpet.rb
Merge branch 'dwoll-master'