Adding gradle build

build.gradle

@@ -0,0 +1,33 @@
+apply plugin: 'java'
+apply plugin: 'maven'
+
+// Publishing stuff
+group = 'com.github.jjos2372'
+
+sourceCompatibility = 1.8
+targetCompatibility = 1.8
+
+repositories {
+    jcenter()
+    mavenCentral()
+    maven { url 'https://jitpack.io' }
+}
+
+dependencies {
+    compile 'org.bitcoinj:bitcoinj-core:0.15.6'
+}
+
+task sourcesJar(type: Jar, dependsOn: classes) {
+    classifier = 'sources'
+    from sourceSets.main.allSource
+}
+
+task javadocJar(type: Jar, dependsOn: javadoc) {
+    classifier = 'javadoc'
+    from javadoc.destinationDir
+}
+
+artifacts {
+    archives sourcesJar
+    archives javadocJar
+}