add write blob
Merge branch 'dev' of github.com:gogits/git into dev
add create branch
add create tag
Merge branch 'dev' of github.com:gogits/git into dev

Conflicts:
	blob.go
	repo_branch.go
Merge branch 'master' into dev

Conflicts:
	repo_tag.go
Merge branch 'master' of github.com:gogits/git into dev