v0.7.4b: Initial LibGDX commit! more details below:

Large sections of game logic are now working through libgdx instead of
android libraries. There is still work to do but this is the first
major step. Big changes include:
- Graphics code is now through LibGDX (except for text rendering)
- Initialization and screen-handling logic is now mostly through LibGDX
- Audio is now through LibGDX
- Input handling is now through LibGDX
- Most misc functions are now through LibGDX

SPD-classes/build.gradle

@@ -6,5 +6,54 @@ android {
     defaultConfig {
         //noinspection MinSdkTooLow
         minSdkVersion appAndroidMinSDK
+
+        consumerProguardFiles 'proguard-rules.pro'
+    }
+    sourceSets {
+        main {
+            jniLibs.srcDirs = ['libs']
+        }
     }
 }
+
+configurations { natives }
+
+dependencies {
+    //TODO migrate this to implementation from api
+    //in order to do this I have to remove 100% of libGDX API access from core
+    api "com.badlogicgames.gdx:gdx-backend-android:$gdxVersion"
+    natives "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-armeabi"
+    natives "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-armeabi-v7a"
+    natives "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-x86"
+    natives "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-arm64-v8a"
+    natives "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-x86_64"
+    implementation "com.badlogicgames.gdx:gdx-controllers:$gdxVersion"
+    implementation "com.badlogicgames.gdx:gdx-controllers-android:$gdxVersion"
+}
+
+// called every time gradle gets executed, takes the native dependencies of
+// the natives configuration, and extracts them to the proper libs/ folders
+// so they get packed with the APK.
+task copyAndroidNatives() {
+    file("libs/armeabi/").mkdirs()
+    file("libs/armeabi-v7a/").mkdirs()
+    file("libs/arm64-v8a/").mkdirs()
+    file("libs/x86_64/").mkdirs()
+    file("libs/x86/").mkdirs()
+
+    configurations.natives.files.each { jar ->
+        def outputDir = null
+        if(jar.name.endsWith("natives-arm64-v8a.jar")) outputDir = file("libs/arm64-v8a")
+        if(jar.name.endsWith("natives-armeabi-v7a.jar")) outputDir = file("libs/armeabi-v7a")
+        if(jar.name.endsWith("natives-armeabi.jar")) outputDir = file("libs/armeabi")
+        if(jar.name.endsWith("natives-x86_64.jar")) outputDir = file("libs/x86_64")
+        if(jar.name.endsWith("natives-x86.jar")) outputDir = file("libs/x86")
+        if(outputDir != null) {
+            copy {
+                from zipTree(jar)
+                into outputDir
+                include "*.so"
+            }
+        }
+    }
+}