Correct the type of git_blob_chunk_cb
Bump hlibgit2 to 0.18.0.11
Create blobs more efficiently when conduits are used
Bump version to 2.2.0.0
Add tests to gitlib-lens
Incorporate further uses of conduit
Remove Git.Classy from gitlib-lens
Add a missing pragma to Libgit2.hs
Merge branch 'fpco'

Conflicts:
	gitlib-libgit2/Git/Libgit2.hs
Use stm-conduit 2.1.4