- AndroidActivity allows setting layout via default-'value'
 - Updated HelloWorld Example
some minor code clean-ups
enhanced gradle build
 - includes Xtend compiler
 - multi-project build (includes example/HelloWorld and Xtendroid for now)
 - bumped minSdk to 11 (lint was complaining)
added gradle wrapper
deleted xtend-gen
more gradle builds, eclipse settings and android sdk version update
Merge pull request #11 from svenefftinge/master

Full Gradle Build and more