Added explanation for Gradle, typo fix

Author: witold-prucnel

README.md

@@ -39,8 +39,8 @@ This is a PhpStorm IDE plugin for a better Magento 2 development workflow. It is
 1. Check out this repository
 1. Open a folder with the project in the IntelliJ Ultimate using the `open` action button.
 1. Make sure that you on the latest develop branch (e.g `1.0.0-develop`)
-1. Right-click on the `build.gradle` file, choose "Import Gradle project"
-1. When the Gradle sections appeared in the right bar, navigate there and right-click `magento-2-php-storm-plguin > Tasks -> Intellij -> runIde`
+1. Right-click on the `build.gradle` file, choose "Import Gradle project" (you need to have Gradle plugin installed)
+1. When the Gradle sections appeared in the right bar, navigate there and right-click `magento-2-php-storm-plugin > Tasks -> Intellij -> runIde`
 1. Click `Run "magento-2-php-storm-plugin"` to run the plugin. You should see a new instance of IntelliJ launched with the plugin installed. Make sure the plugin is enabled in IntelliJ settings and indexing is finished. Plugin features should be accessible at this point.
 
 ## How to contribute