++libgit2
Update fixtures
use -UTF8String instead of -fileSystemRepresentation in -entryWithName:error:
Properly compose filename based off core.precomposeunicode config setting when adding or removing files

Conflicts:
	Classes/GTIndex.m
Accept NSString instead of NSURL
update fixtures
Update fixtures
add tests
Check test statuses with -enumerateFileStatusWithOptions:error:usingBlock:
Merge pull request #364 from libgit2/utf8-paths-purgatory

Merge -UTF8String changes in GTIndex into purgatory
Merge remote-tracking branch 'origin/purgatory'