Add gss alias for git status -s

plugins/git/git.plugin.zsh

@@ -29,6 +29,8 @@ alias glg='git log --stat --max-count=5'
 compdef _git glg=git-log
 alias glgg='git log --graph --max-count=5'
 compdef _git glgg=git-log
+alias gss='git status -s'
+compdef _git gss=git-status
 
 # Git and svn mix
 alias git-svn-dcommit-push='git svn dcommit && git push github master:svntrunk'