Merge pull request #75 from kanelbulle/fix_gradle_build

Fix gradle build
Add override to request subclasses
Avoid NPE in multi transformation getId().
Fix safe key caching.
Don't memoize id in ImageVideoModelLoader
Allow puts of same resource to LruCache repeatedly
Add jar target and get AndroidStudio 0.6.2 working.
Fix android studio gradle build and lint errors.
Working auto import into intellij using pom files