Project-wide refactoring, link crash fixes

android/AndroidManifest.xml

@@ -1,9 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="io.anuke.mindustry"
-    android:versionCode="60"
-    android:versionName="3.3b11" >
+    android:versionCode="61"
+    android:versionName="3.3b12" >
 
+    <uses-feature android:glEsVersion="0x00020000" android:required="true" />
     <uses-permission android:name="com.android.vending.BILLING" />
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

android/src/io/anuke/mindustry/AndroidLauncher.java

@@ -4,7 +4,6 @@ import android.Manifest;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
-import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
 import android.telephony.TelephonyManager;
@@ -49,13 +48,6 @@ public class AndroidLauncher extends AndroidApplication{
 				return NumberFormat.getIntegerInstance().format(number);
 			}
 
-			@Override
-			public void openLink(String link){
-				Uri marketUri = Uri.parse(link);
-			    Intent intent = new Intent( Intent.ACTION_VIEW, marketUri );
-			    startActivity(intent); 
-			}
-
 			@Override
 			public void addDialog(TextField field, int length){
 				TextFieldDialogListener.add(field, 0, length);