module system v3: independant folder for each module + retrocompat v2/v3

Author: Unitech

bin/pm2

@@ -440,8 +440,11 @@ commander.command('update')
  */
 commander.command('install <module|git:// url>')
   .alias('module:install')
+  .option('--v1', 'install module in v1 manner (do not use it)')
   .description('install or update a module and run it forever')
-  .action(function(plugin_name) {
+  .action(function(plugin_name, opts) {
+    if (opts.v1)
+      commander.v1 = true;
     pm2.install(plugin_name, commander);
   });