Fixes bugs for Groups w.r.t depositor
Merge pull request #542 from projecthydra-labs/feature/resolve-group-bugs

Fixes bugs in Groups w.r.t depositor
Update Readme
Merge pull request #545 from projecthydra-labs/feature/correction-in-readme

Update Readme
Setting rspec ecosystem to v2.x

With RSpec 3 being released, the RSpec API may have changed. This is
a conjecture on why the specs are failing.

Updating so DOI works for GenericWork
Merge pull request #546 from projecthydra-labs/pegging-to-rspec-2

Setting rspec ecosystem to v2.x
Merge remote-tracking branch 'upstream/develop' into fork-updates