SDL: switched build system from Ant to Gradle, because Google forced this piece of shit on me with SDK update

If you are getting build errors, delete the directory project/app/build

project/app/build-template.gradle

@@ -0,0 +1,19 @@
+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 25
+    buildToolsVersion "26.0.0"
+
+    defaultConfig {
+        applicationId "net.olofson.ballfield"
+        minSdkVersion 9
+        targetSdkVersion 25
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
+        }
+    }
+}

project/app/src/main/AndroidManifest.xml

@@ -0,0 +1 @@
+../../../AndroidManifest.xml

project/app/src/main/assets

@@ -0,0 +1 @@
+../../../assets

project/app/src/main/java

@@ -0,0 +1 @@
+../../../src/

project/app/src/main/jniLibs

@@ -0,0 +1 @@
+../../../libs/

project/app/src/main/res

@@ -0,0 +1 @@
+../../../res