bump libgit2 to 9007c5
bump libgit2 to 504a4f
bump libgit2 to 177763
bump libgit2 to 0c01f9
bump libgit2 to b2984e
bump libgit2 to 9d6d80
bump libgit2 to af2c72
bump libgit2 to 9afc59
bump libgit2 to 8d863a
bump libgit2 to 17ef7d
bump libgit2 to cfbd08
bump libgit2 to 9d9fff
Bump libgit2 with breaking refs changes
Reference changes
wrap git_reference_is_valid_name as Rugged::Reference.valid_name?
Merge remote-tracking branch 'origin/refname-validity' into development

Conflicts:
	ext/rugged/rugged_reference.c
Clean `valid_name?`
bump libgit2 to e236b3
bump libgit2 to 987ab7
bump libgit2 to 2e1fa1