Deprecate custom shape bundle

A new class, GeoUnidentifiedShape, was added to the Kernel. This allows to describe arbitrary shapes. Its payload include character string data that can be filled with whatever information is needed to describe an shape object. This will be used, for example, as a proxy for LArCustomShape. Corresponding changes are required in GeoModelIO and GeoModelG4.

Also, in this package I commented out the calls to qDebug(), since now the release build fails to silence these errors on the ubuntu platform and there seems to be no other way to stop reams of output from appearing on the screen.