Gradle Refresh

- move common functions to functions.gradle
 - use dependency aliases whenever possible
 - update to gradle 2.1
 - cleanup build.gradle files with proper spacing
 - remove duplicated blocks
 - compile incrementally (java)

Gradle Refresh v2

 - alphabetical order dependencies
 - added jdk8 to build tests
 - moved script to file for travis

Gradle Refresh v2a

 - fix travis
 - remove pointless logging

jdk8 isn't ready for travis

brut.apktool/apktool-cli/build.gradle

@@ -13,7 +13,7 @@
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
-apply plugin: 'fatjar'
+apply plugin: 'eu.appsatori.fatjar'
 
 configurations {
     proguard
@@ -21,7 +21,7 @@ configurations {
 
 dependencies {
   compile project(':brut.apktool:apktool-lib')
-  proguard 'net.sf.proguard:proguard-base:4.8'
+  proguard depends.proguard
 }
 
 gradle.taskGraph.whenReady {