Add boilerplate gradle file

Author: R. Tyler Croy

.gitignore

@@ -1,2 +1,3 @@
 .gradle
 build/
+*.sw*

README.md

@@ -1,6 +1,6 @@
 jruby-gradle-jar-plugin
 =======================
 
-[![Gitter chat](https://badges.gitter.im/jruby-gradle/jruby-gradle-plugin.png)](https://gitter.im/jruby-gradle/jruby-gradle-plugin)
+[![Build Status](https://buildhive.cloudbees.com/job/jruby-gradle/job/jruby-gradle-jar-plugin/badge/icon)](https://buildhive.cloudbees.com/job/jruby-gradle/job/jruby-gradle-jar-plugin/) [![Gitter chat](https://badges.gitter.im/jruby-gradle/jruby-gradle-plugin.png)](https://gitter.im/jruby-gradle/jruby-gradle-plugin)
 
 Plugin for creating JRuby-based java archives

build.gradle

@@ -0,0 +1,80 @@
+apply plugin: 'groovy'
+apply plugin: 'maven'
+apply plugin: 'com.jfrog.bintray'
+
+buildscript {
+    repositories { jcenter() }
+    dependencies { classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:0.5' }
+}
+
+group = 'com.github.jruby-gradle'
+version = '0.1.0'
+
+if (System.env.RELEASE != '1') {
+    version = "${version}-SNAPSHOT"
+}
+sourceCompatibility = '1.7'
+
+repositories {
+    jcenter()
+    mavenLocal()
+}
+
+dependencies {
+    compile gradleApi()
+    compile localGroovy()
+
+    testCompile ("org.spockframework:spock-core:0.7-groovy-${gradle.gradleVersion.startsWith('1.')?'1.8':'2.0'}") {
+        exclude module : 'groovy-all'
+    }
+}
+
+test {
+    testLogging {
+        showStandardStreams = true
+        exceptionFormat "full"
+    }
+}
+
+task sourcesJar(type: Jar, dependsOn: classes) {
+    classifier = 'sources'
+    from sourceSets.main.allSource
+}
+
+artifacts {
+    archives sourcesJar
+}
+
+// Ensure we don't fail in CI or on a system without these values set in
+// ~/.gradle/gradle.properties
+if (!hasProperty( 'bintrayUser' ))
+  ext.bintrayUser = ''
+
+if (!hasProperty( 'bintrayKey' ))
+  ext.bintrayKey = ''
+
+bintray {
+    user = project.bintrayUser
+    key = project.bintrayKey
+    publish = true
+    dryRun = false
+    configurations = ['archives']
+
+    pkg {
+        userOrg = 'jruby-gradle'
+        repo = 'plugins'
+        name = 'jruby-gradle-jar-plugin'
+        labels = ['jruby']
+
+        version {
+            name = project.version
+            vcsTag = "v${project.version}"
+            attributes = ['gradle-plugin' : 'com.github.jruby-gradle:com.github.jruby-gradle:jruby-gradle-jar-plugin']
+            desc = 'This plugin encapsulates java archive building functionality for JRuby Gradle projects'
+
+        }
+    }
+}
+bintrayUpload.dependsOn assemble
+
+// vim: ft=groovy