GitLab

While CPack, the component used for handling installation of files into
proper places, works fine for `install` make target, it does somewhat
poor job when it comes to generating stand-alone packages.

List of offending items include:
* Improper tar archive structure (directory entries missing)
* Package layout not suitable for running stand-alone
* Top level directory name keeps changing which hinders upcoming
  installer

Thic commit takes care of these problems by generating the package using
`make install` and then shuffling files around manually.

This also changes the hash blurb to be 7 characters instead of 8, to be
more compatible with git defaults.