Merge pull request #18 from gucki/master

fixed passing of link_html options
remove Gemfile.lock
adds Gemfile.lock to gitignore.
adjusts version of rails for dummy app.
bumps the version.
Update README.md
Unobtrusive rule checking
Merge pull request #26 from mikepack/controller_path

Unobtrusive rule checking
only use path as default highlighting rule
optimized #highlights_on?