Update gradle plugin and wrapper

* Android Gradle plugin updated to 0.7.+
* Bundled Gradle wrapper updated to 1.9
* These versions are required for Android Studio 0.4

Signed-off-by: Eddie Ringle <eddie@eringle.net>

Author: EddieRingle

build.gradle

@@ -4,7 +4,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:0.6.3'
+        classpath 'com.android.tools.build:gradle:0.7.+'
     }
 }
 
@@ -19,4 +19,4 @@ allprojects {
     repositories {
         mavenCentral()
     }
-}
+}

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=http\://services.gradle.org/distributions/gradle-1.8-bin.zip
+distributionUrl=http\://services.gradle.org/distributions/gradle-1.9-bin.zip

library/build.gradle

@@ -3,7 +3,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:0.6.3'
+        classpath 'com.android.tools.build:gradle:0.7.+'
     }
 }
 apply plugin: 'android-library'
@@ -26,4 +26,4 @@ android {
     }
 }
 
-apply from: 'https://raw.github.com/chrisbanes/gradle-mvn-push/master/gradle-mvn-push.gradle'
+apply from: 'https://raw.github.com/chrisbanes/gradle-mvn-push/master/gradle-mvn-push.gradle'

sample/build.gradle

@@ -3,7 +3,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:0.6.3'
+        classpath 'com.android.tools.build:gradle:0.7.+'
     }
 }
 apply plugin: 'android'