test_helper.rb: remove Simple.start which is handled by .simplecov
spec_helper.rb: don't require simplecov on Ruby 1.8.7
Merge pull request #418 from aspiers/topic/test-coverage

fix rspec tests on Ruby 1.8.7
add versioning meta data to v2 API calls.  plus preliminary BDD awarenesss of it
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