Initial commit

* Adds a ActiveRecord plugin called acts_as_html_sanitizer, which hooks into the before_validation hook
* Works with Rails 3.2 - 4.1
Ignore lockfile for gemfile
Added Travis CI configuration

* Configured to run against MRI Ruby 1.9.3 - 2.1.1, JRuby (in 1.9 mode) and Rubinius, as well as Rails v3.2, 4.0 and 4.1
Removing duplication of the SQLite3 gem