add support for Gemfile.d and routes.d plugin mechanisms
add coveralls support
Merge pull request #417 from cloudedge/pull-req-master-b360f70bed53264d37cda69c5f946406e92e65be

Merged by devtool for VictorLowther
Merge pull request #419 from aspiers/topic/plugins

Merged by devtool for VictorLowther
Merge pull request #420 from aspiers/topic/coveralls

Merged by devtool for VictorLowther
move role_element_order to snapshot
work around missing network test helpers until we have a better fix
add committed snapshot and role_attrib relationships
minor error caught in tests
update routes for shared resources to use api/v2 pattern instead of barclamps