Bump the version to 1.7.0 for release

Author: rtyler

build.gradle

@@ -14,7 +14,7 @@ allprojects {
     apply plugin: 'idea'
 
     group = 'com.github.jruby-gradle'
-    version = '1.6.0'
+    version = '1.7.0'
 
     if (!releaseBuild) {
         version = "${version}-SNAPSHOT"

gradle.properties

@@ -7,8 +7,8 @@ bintrayUser=
 bintrayKey=
 releaseBuild=false
 
-targetCompatibility=1.7
-sourceCompatibility=1.7
+targetCompatibility=1.8
+sourceCompatibility=1.8
 jrubyVersion=9.2.7.0
 jettyVersion=9.2.12.v20150709
 torqueboxProxy=http://rubygems-proxy.torquebox.org/releases