update build tools, add travis config.

.travis.yml

@@ -0,0 +1,12 @@
+language: android
+android:
+  components:
+  - tools
+  - platform-tools
+  - build-tools-25.2.0
+  - android-25
+  - extra-android-support
+  - extra
+  - extra-android-m2repository
+script:
+  - ./gradlew assembleDebug

build.gradle

@@ -8,7 +8,7 @@ buildscript {
         }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.2.3'
+        classpath 'com.android.tools.build:gradle:2.3.0'
         classpath 'com.github.dcendents:android-maven-plugin:1.2'
 
         // NOTE: Do not place your application dependencies here; they belong

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Wed Mar 08 17:06:52 CST 2017
+#Thu Mar 09 16:07:03 CST 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip

library/build.gradle

@@ -11,8 +11,8 @@ android {
 }
 
 dependencies {
-    compile 'com.android.support:recyclerview-v7:25.1.1'
-    compile 'com.android.support:support-v4:25.1.1'
+    compile 'com.android.support:recyclerview-v7:25.2.0'
+    compile 'com.android.support:support-v4:25.2.0'
 }
 apply from: './gradle-mvn-push.gradle'