Log Message:
Update darcs to 2.0.2.

Changes since 1.0.9 includes

  * New Feature: Include patch count in darcs --version, for example,
    2.0.1 (+ 32 patches) (David Roundy)

  * New Feature: darcs put --no-set-default and --set-default (Nicolas
    Pouillard)

  * UI changes: --extended-help is now called --overview, no more
    --verify-hash, no more send --unified (David Roundy, Eric Kow)

  * New Feature: Check for and repair patches which remove non-empty files
    (issue815, David Roundy)

  * New Feature: darcs trackdown --set-scripts-executable (Reinier Lamers)

  * User Experience: Make darcs changes --interactive behave more like other
    interactive commands (Eric Kow)

  * New Feature: Colorize added and removed lines, if the environment variable
    DARCS_DO_COLOR_LINES=True (Nicolas Pouillard)

  * New Feature: --remote-repodir flag to allow separate default repositories
    for push, pull and send (issue792, Eric Kow)

  * New Feature: darcs changes --count (David Roundy)

  * New Feature: Add a 'show authors' command (Eric Kow)

  * New Feature: New DARCS_PATCHES, DARCS_FILES and DARCS_PATCHES_XML
    environment variables are made available for the posthook system, allowing
    for more easier options to to integrate darcs with other systems. (David
    Roundy, Mark Stosberg)

  * New Feature: Automatically create the the global cache if we define we
    want to use it. (David Roundy, Trent Buck)

and numerous performance improvements and bugfixes.