add wrapper task to generate/update Gradle wrapper
upgrade gradle to 1.6
remove deprecated method add() and replace it with create(). create task 'compile' which calls 'compileJava'
Merge branch 'master' of github.com:deanhiller/playorm into gradle

Conflicts:
	gradle/wrapper/gradle-wrapper.properties
Merge pull request #134 from hsn10/gradle

Small fix after gradle 1.6 update