Revert to 1.8 as 1.10 is causing the build to fail

... complicated build server issues ... apparently isn't going to be resolved until Gradle 1.12.

Author: benjchristensen

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-1.10-all.zip
+distributionUrl=http\://services.gradle.org/distributions/gradle-1.8-all.zip