Add Rugged::Repository#merge_base.
don't actually need to install libgit2
Merge pull request #129 from ymendel/update_dev_docs

Remove libgit2 from development documentation
bump libgit2 to latest

submodules!
Merge pull request #130 from ymendel/bump_libgit2

bump libgit2 to latest
Accept more things as input for merge_base.
TAB
More consistent naming for merge_base_oid's implementation.

Also, make it private, as merge_base is the outward-facing API.
Rename private method.
Very necessary typecheck
Document branch API
Merge pull request #131 from libgit2/branch-docs

Document branch API
Tests are back to TestCase because Fuck Specs
We won't be needing that anymore
Rewrite in C.
Fix unicode test
Merge pull request #132 from libgit2/resilent-tests

Paving the way to a more resilient test suite
Merge pull request #128 from spraints/merge-base

Add Rugged::Repository#merge_base.
Revparse in any places when an object is passed
Oh man, test prefixes