add missing gradle files

Author: DonMat

.gitignore

@@ -8,7 +8,6 @@
 /captures
 .externalNativeBuild
 .gradle/
-gradle/
 local.properties
 *.DS_Store
 build/

build.gradle

@@ -9,6 +9,7 @@ buildscript {
     dependencies {
         classpath 'com.android.tools.build:gradle:3.0.1'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+        classpath 'com.github.dcendents:android-maven-gradle-plugin:2.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

gradle/wrapper/gradle-wrapper.jar

@@ -0,0 +1,6 @@
+#Sat Dec 16 12:28:47 CET 2017
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,8 @@
 apply plugin: 'java-library'
 apply plugin: 'kotlin'
+apply plugin: 'com.github.dcendents.android-maven'
+
+group = 'com.github.DonMat'
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])