Add support for embedded style blocks and files with asset pipeline digests

Tests for asset pipeline are broken due to need to strip leading backslash on href. Perhaps there is a way to handle hrefs with or without leading backslash. 

Test for embedded style block are working.

Test for remote file is broken in that the url's for assets are not being rewritten to point to the asset host. This appears to be failing in pre-forked code, but I can't guarantee it. 

I bumped the version so that I could ensure that I was getting the correct version installed on the production servers. I apologize for that change.