[ISSUE-439] First pass on converting appledoc from GC->ARC.
[ISSUE-439] Convert appledoc-test to ARC
[ISSUE-439] Code workarounds to resolve API changes in DDGetoptLongParser and new clang pedantry.
[ISSUE-439] Use %s format when printing longopt names
[ISSUE-439] Update GRMustache to 7.0.2
[ISSUE-439] Nuke GRMustache 3rdparty directory
[ISSUE-439] Update GBTask to properly clean up notification observation.
[ISSUE-439] Remove unnecessary data source handling for GRMustache.
[ISSUE-439] Downgrade Mustache; apparently there were modifications since v1.1.3 which break appledoc.
[ISSUE-439] Cleanup after merge in from master.
Merge pull request #466 from sptramer/issue-439

Convert appledoc to use ARC