bump libgit2 to af9eea
bump libgit2 to 8443ed
bump libgit2 to e79a29
bump libgit2 to 4f9d54
Build libgit2 with RelWithDebInfo
Merge pull request #364 from mekishizufu/cmake_flag

Build libgit2 with optimizations
Introduce Rugged::RemoteCollection.

This adds a RemoteCollection class, that exposes a similar API as e.g.
ReferenceCollection and others.

Repository#remotes now returns an instance of RemoteCollection.
Switch the tests over to the new RemoteCollection API.
Documentation updates.