Fix build.gradle and add gradle/Android Studio entries to gitignore

.gitignore

@@ -14,3 +14,15 @@ local.properties
 *.a
 *.orig
 *.rej
+
+
+# Downloaded gradle wrapper
+.gradle
+
+# Android Studio project files
+.idea
+*.iml
+
+# Gradle build files
+build
+.externalNativeBuild

love/build.gradle

@@ -6,12 +6,13 @@ android {
     // See https://code.google.com/p/android/issues/detail?id=52962
     // and http://stackoverflow.com/questions/27277433/why-does-gradle-build-my-module-in-release-mode-when-the-app-is-in-debug
     // defaultPublishConfig "debug"
-    compileSdkVersion rootProject.ext.compileSdkVersion
-    buildToolsVersion rootProject.ext.buildToolsVersion
+    compileSdkVersion 25
+    buildToolsVersion "25.0.2"
 
     defaultConfig {
         compileSdkVersion 25
         buildToolsVersion "25.0.2"
+        minSdkVersion 10
         externalNativeBuild {
             ndkBuild {
                 arguments "-j2"

love/src/main/AndroidManifest.xml

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest package="org.love2d.android.library" xmlns:android="http://schemas.android.com/apk/res/android">
+</manifest>