Update compile

Remove boot.properties copying
Remove props version test.
Remove props use when executing sbt.
Merge pull request #68 from jsimone/master

Remove copying of boot.properties
Merge branch 'master' of https://github.com/heroku/heroku-buildpack-scala

Conflicts:
	test/compile_test.sh
Merge branch 'master' of https://github.com/georgeOsdDev/heroku-buildpack-scala