Added milestone list function.

Supports #102.
Added createMilestone function.

Supports #102.
Added get milestone function.

Supports #102.
README additions for milestone.

Also copyright change on milestone.coffee, package addition of myself as
contributor. Supports #102.
Compiled changes. Fixes #102.
Fixed a bug in create milestone.
Added milestone delete
Fixed cb typo
Removed commented code
Merge pull request #103 from rhyolight/add-milestones

Add milestones