Improve README to ease the use by the community

Author: msaelices

README.md

@@ -4,18 +4,35 @@ component screenshots at [nativescript-vue.org](https://nativescript-vue.org/).
 
 ## System requirements
 * Node 7.6 or higher (for async function support).
-* The [Appium](http://appium.io/) client. Just download and install the latest [from GitHub](https://github.com/appium/appium-desktop/releases/latest).
+* The [Appium](http://appium.io/) client. Just download and install the latest [from GitHub](https://github.com/appium/appium-desktop/releases/latest) or execute the following command:
+
+```bash
+npm install -g appium
+```
 
 ## Running the tests locally
-Start Appium and press 'Start the server', or you'll receive an error `127.0.0.1:4723` can't be reached.
+
+Start Appium, which is
+
+* Using the desktop app, press 'Start the server'
+* Using the NPM package, execute `appium` on a terminal
+
+Otherwise you'll receive an error `127.0.0.1:4723` can't be reached.
 
 ### Android
+
+Edit the `appium.capabilities.json` config file, in the `android23`, with your device/emulators parameters, probably only the `avd` or `deviceName` parameters would be enough.
+
+Start the tests:
+
 ```bash
 npm run android.build
+adb install platforms/android/app/build/outputs/apk/nativescriptvueuitests-debug.apk
 npm run android.screenshots
 ```
 
 ### iOS
+
 ```bash
 npm run ios.build
 npm run ios.screenshots