Add basic features integration.
Couple errors found, thanks to coding standards. :P
Fix XSLT export and slightly adjust generated code.
Fix including of feature files.

...  Misunderstood the comment in the features.api.php... Great fun!
Fix things...

... Bad hook name, and hopefully allow inclusions to happen
automatically?
Revert and rebuild are not as different as I thought...
Naive attempt to get XSLT records created first...
Stop trying to handle XSLTs nicely.

Dependencies just are not handled nicely in features, at all...
Nuke unused variable.

Since it's a hook, returning nothing(/NULL) is fine.
Report conflicts for XSLTs, based on names.
Merge pull request #157 from adam-vessey/7.x-METRO-60

Features integration for default DC transformation info