[autosudo plugin] fix pip at virtual_env

plugins/autosudo/README.md

@@ -0,0 +1,8 @@
+
+Development
+============
+
+1.  virtual_env pip
+if virtual env path is writeable by user (e.g. $HOME), not need sudo. 
+export VIRTURL_ENV="path" 
+	

plugins/autosudo/autosudo.plugin.zsh

@@ -16,11 +16,16 @@ function clyde() {
 	esac
 }
 
+# special: virtual_env 
 function pip() {
+	if [[ -n ${VIRTUAL_ENV+1} && -w $VIRTUAL_ENV ]]  ; then
+		command pip $* 
+	else
 		case $1 in 
 			install | uninstall ) sudo pip $* ;;
 			*)  command pip $* ;;
 		esac
+	fi
 }
 
 function npm() {