Merge pull request #266 from yukinying/git-ssh-protocol

support ssh:// for git
diff --git a/gosrc/vcs.go b/gosrc/vcs.go
index 9668091..9bc5fd0 100644
--- a/gosrc/vcs.go
+++ b/gosrc/vcs.go
@@ -97,7 +97,7 @@
 
 var vcsCmds = map[string]*vcsCmd{
 	"git": {
-		schemes:  []string{"http", "https", "git"},
+		schemes:  []string{"http", "https", "ssh", "git"},
 		download: downloadGit,
 	},
 	"svn": {