Add Java 1.7 source compatibility. Fixes #7

.travis.yml

@@ -1,18 +1,24 @@
 language: groovy
 
-env:
-    global:
-        - secure: "MzOFFRAE6bEO5NzGQBFQ1am0lHwbsWqRdP/OTL/Ka/QgjryIETiLZdNUua23DwcJMuiMKVR0I03lqW5PCF0yT1+R8KECncF1P61YrHtATr0KhfXJ/z3DcqtxsBJ4gtVEJfuBXCgdHyYbMmS6UJVMgejCqv4YKYQggtOe/wgNm0PjwPOEQ7aktz47yEUbQOr9jxNwYDLNGzbgc9oBt+rFFYY+EfcbLQrrfq6sMyioc9c8UqNESRcAgapptwnywofd1fbgSvZ1kYpwD9scPcFgZFiG7KzNyxU0/GL2ojAT3buZFYKEToAFLTKFdHJTzwMMlUOMFoW4FB/aMlObvCcaguuMhkoD8ApaJg9Y3YLTkUzBDc6AvIvg4MwoujP6NawJJZEinG1EtuKc577WtXIpaA700s+m/go/Bsel27TUIFWnPQiPUyuyUoHvd/1xI2d1EWKZjudeaHTIhv5N8Y1W3Lb2AriSZ2ijK22I4QnrikDv1iWTaPYr8EGJbOOp4ifldLEpBJZSk8Eqv40ow5nSPNc8wmQ5Zd38wgp/qY0ZBgVOtKAUzi4t6K2hyTr7gIZ1fKyhYrIZuQFluLnQAzHQcNZM/Hlf5c9DS6tdJhSYBFbqzSlZ7UL3E98+3MZ9Bc15Z8HTlGrw1NTbLrAgpmE12PJN+oBR5U+Hay5VOJIpu+w="
-        - secure: "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"
-
-script: ./gradlew clean build
+groovy:
+    - 2.3.6
+    - 2.3.9
 
 jdk:
     - oraclejdk8
 
+install: true
+
+script: ./gradlew clean build
+
 after_success:
     - .buildscript/deploy_snapshot.sh
 
+env:
+    global:
+        - secure: "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"
+        - secure: "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"
+
 branches:
     except:
         - gh-pages

build.gradle

@@ -14,6 +14,7 @@ buildscript {
 }
 
 apply plugin: 'groovy'
+apply plugin: 'java'
 apply plugin: 'com.github.ben-manes.versions'
 apply plugin: 'com.gradle.plugin-publish'
 
@@ -24,9 +25,11 @@ repositories {
 dependencies {
     compile gradleApi()
     compile localGroovy()
-    compile 'com.android.tools.build:gradle:1.3.1'
+    compile 'com.android.tools.build:gradle:1.5.0'
 }
 
+sourceCompatibility = JavaVersion.VERSION_1_7
+
 group = GROUP
 version = VERSION_NAME
 
@@ -45,7 +48,7 @@ pluginBundle {
 }
 
 task wrapper(type: Wrapper) {
-    gradleVersion = '2.8'
+    gradleVersion = '2.9'
     distributionUrl = "https://services.gradle.org/distributions/gradle-${gradleVersion}-all.zip"
 }