[RBTools] Darcs support

Review Request #2056 — Created Jan. 20, 2011 and discarded — Latest diff uploaded

Information

RBTools

Reviewers

This patch adds support for Darcs to RBTools, to go along with another patch I posted recently, adding Darcs support to Review Board itself.
I have tested the following on Linux:
* Correctness of generated diffs
* Uploading diffs to a local Review Board server