Convert splitter engine to be a Sprockets bundle processor.
Test asset pipeline stylesheet splitting.
Add split_count option to split_stylesheet_link_tag helper and fix ordering of split stylesheets.
Update README with changes.
Merge pull request #35 from Umofomia/bundle-processor

Convert splitter engine to be a Sprockets bundle processor
bumped version to 0.4.0 and updated CHANGELOG+README
links
formatting
Update README.md
only load engine integration if Rails is actually defined