Revert "Changing the package name to `ch.epfl`."

This reverts commit 1116eb024849b6bc41987e027bc7ae567c36a9a1.

Conflicts:

	common/src/main/scala/records/VampireMacros.scala
Killing some monsters :)

Review by @gzm0
True hygiene.

Review by @gzm0
Lub tests for Scala 2.11.

Review by @gzm0