New pull from aws
Silence a warning
Disable debug code in gitlib-libgit2
README.md: fix formatting for display on Github

Currently, at least on Github, the code blocks aren't formatted as such.
Merge pull request #18 from Blaisorblade/patch-1

README.md: fix formatting for display on Github
Move strToOid to S3.hs
Deal with partial Oids in gitlib-libgit2 (#2495)
Allow reading objects by partial Oid from S3 (#2495)
Make calls to withLibGitDo implicit
Fix last commit
Remove dependency on the unix package from gitlib

Fixes #19
Reference targets are now Oid, instead of CommitOid

Fixes #20
Disable debugging Libgit2.hs again
Remove an unneeded import
Simplified gitlib-libgit2/test/Smoke.hs
Allow gitlib-libgit2 to use MonadLogger throughout
Resolve some build warnings in gitlib
Support simple diff output from Libgit2
Only using lgDiffContentsWithTree directly for now
Only output file headers for files with changes