Add Travis CI integration

.travis.yml

@@ -0,0 +1,13 @@
+sudo: false
+language: android
+script: "./gradlew build"
+android:
+  components:
+    - platform-tools
+    - tools
+    - build-tools-23.0.3
+    - android-23
+    - extra-android-m2repository
+    - extra-google-m2repository
+notifications:
+  email: false

app/build.gradle

@@ -51,6 +51,10 @@ android {
     dexOptions {
         incremental true
     }
+
+    lintOptions {
+        abortOnError false
+    }
 }
 
 dependencies {

build.gradle

@@ -5,7 +5,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.1.2'
+        classpath 'com.android.tools.build:gradle:2.1.3'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.10-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip