1.1: Support rollback through the VCS interface and add some stubs for P4 …

Support rollback through the VCS interface and add some stubs for P4 checkin, checkout, and history.

1.0.1

Properly handle unversioned files and refresh of the Changes view.

1.0

Initial support for P4 actions other than just add/edit/delete

0.9-beta

Rudimentary caching support, use "P4 have" list for smarter operation, better logging.

0.8-beta

Properly track client state so that "Changes" view is correct.

0.7-beta

Add support for .p4ignore files.