src/main/java/*.xtend is compiled to correct target by Maven

Signed-off-by: Oliver Libutzki <oliver@libutzki.de>
Xtext/Xtend 2.5.3 Update

Signed-off-by: Oliver Libutzki <oliver@libutzki.de>
Merge branch 'newmaster' of https://github.com/OLibutzki/smarthome into newmaster

Signed-off-by: Oliver Libutzki <oliver@libutzki.de>