Fix(state): state reset --plugins|--platforms was resetting both

fixes ionic-team/ionic-cli#399

Author: jakub-g

lib/state.js

@@ -799,8 +799,14 @@ State.checkAndSaveConfigXml = function checkAndSaveConfigXml(appDirectory, plugi
 State.resetState = function resetState(appDirectory, options) {
   var platformPath = path.join(appDirectory, 'platforms');
   var pluginPath = path.join(appDirectory, 'plugins');
-  shelljs.rm('-rf', [platformPath, pluginPath]);
-  logging.logger.info('Removed platforms and plugins'.blue.bold);
+  if (options.platforms) {
+    shelljs.rm('-rf', [platformPath]);
+    logging.logger.info('Removed platforms'.blue.bold);
+  }
+  if (options.plugins) {
+    shelljs.rm('-rf', [pluginPath]);
+    logging.logger.info('Removed plugins'.blue.bold);
+  }
   State.restoreState(appDirectory, options)
   .then(function() {
     logging.logger.info('Ionic reset state complete'.green.bold);