Bump rugged version to 0.26.0b2.

Bump rugged version.

Bump version number.

Merge pull request libgit2#665 from libgit2/cmn/bump-v0.25.1

Bump libgit2 and version to v0.25.1

Merge pull request libgit2#664 from libgit2/cmn/bump-v0.24.6

Bump libgit2 and version to v0.24.6

Release 0.25.0

Bump version to v0.24.5

This matches the libgit2 version we bundle.

Bump version.

Bump version.

Bump version to 0.25.0b8.