Fix build.gradle for release builds: * Version number properly set * Filter javadoc source correctly
Fix build.gradle for release builds:
* Version number properly set
* Filter javadoc source correctly

nuan-nuan/sync-android,akhilesh0707/sync-android,nuan-nuan/sync-android,nuan-nuan/sync-android,akhilesh0707/sync-android,cloudant/sync-android,cloudant/sync-android,akhilesh0707/sync-android