Add Play Store link and screenshots to README

README.md

@@ -1,6 +1,12 @@
 # melonDS Android port
 This is a WIP Android frontend for the melonDS Android port. For the Android port of the emulator, check out https://github.com/rafaelvcaetano/melonDS-android-lib
 
+[<img src="https://play.google.com/intl/en_us/badges/static/images/badges/en_badge_web_generic.png" alt="Get it on Google Play" height="80">](https://play.google.com/store/apps/details?id=me.magnum.melonds&pcampaignid=pcampaignidMKT-Other-global-all-co-prtnr-py-PartBadge-Mar2515-1)
+
+|Rom List|Dark Theme|Pocket Physics|Layout Editor|
+|---|---|---|---|
+|![Screenshot 1](./.github/images/screenshot_mobile0.png)|![Screenshot 2](./.github/images/screenshot_mobile1.png)|![Screenshot 3](./.github/images/screenshot_mobile2.png)|![Screenshot 4](./.github/images/screenshot_mobile3.png)|
+
 # What is working
 *  Device scanning for ROMS
 *  Games can boot and run
@@ -34,12 +40,14 @@ It's possible to launch melonDS from third part frontends. For that, you simply
     * `PATH` - a string with the absolute path to the NDS ROM (ZIP files are supported)
 
 # Building
-To build the project you will need Android NDK and CMake.
+To build the project you will need Android SDK, NDK and CMake.
 
-Build steps:
+##Build steps:
 1.  Clone the project, including submodules with:
     
     `git clone --recurse-submodules https://github.com/rafaelvcaetano/melonDS-android.git`
-2.  Open the project in Android Studio.
-3.  Install the Android NDK and CMake from the SDK Manager
-4.  Hit Run
+2.  Install the Android SDK, NDK and CMake
+3.  Build with:
+    1.  Unix: `gradlew :app:assembleGitHubRelease`
+    2.  Windows: `gradlew.bat :app:assembleGitHubRelease`
+4.  The generated APK can be found at `app/gitHub/release`