Add failing tests for moving invalid input times forward.
Add failing tests for moving ambiguous input times forward.
Passing tests for configuring which offset to use during ambiguous or invalid offsets
Merge pull request #101 from moment/feature/configurable-rollback

Configuration for moving ambiguous or invalid input forward or backward
Make links into actual Zone objects instead of just referencing the linked Zone.
Merge pull request #104 from moment/feature/link-to-zone

Make links into actual Zone objects instead of just referencing the linked Zone
added dependency on momentjs