Add create_tag method.  Add tests for new method.
Merge pull request #55 from asedge/create_tag

Create tag via API
Add method to get a list of project events
Add spec for project_events method
Change fixture with a full json response for project events
Support a feasible response for project events
Merge pull request #56 from hassaku/project_events

Add "Get project events" API
fix specs after update to RSpec 3