The source project of this merge request has been removed.
Also simplify long, repeating paths with local variables.
This changes location in the install directory and paths written inside tarballs for tarballs of MC generators. Now everything is in distribution/.
Note that this makes an unconditional change, therefore to be able to merge this, at least a switch, e.g. LCG_USE_HASHES, needs to be added. See SPI-1253 for a discussion.