Add Score-P packages.
Got version 1.2.1 building, but 1.3 and onwards are different.
Improve compiler configuration in otf2 package
Fix cube compiler configuration
added mpileaks (finally!)
Add Score-P 1.3 release. Works for gcc, still some issues with Intel builds.
Merge branch 'features/scorep-packages' into develop
Add command to show packages added in particular git revisions.

spack pkg list    [rev]           list packages for revision.
spack pkg diff    [rev1] [rev2]   diff bt/w packages in rev1 and rev2
spack pkg added   [rev1] [rev2]   pkgs added since rev1
spack pkg removed [rev1] [rev2]   pkgs removed since rev2
update libcircle to download tarball from github/hpc
Support for pkg-config.
Fileutils successfully finds libarchive; can't find dtcmp despite config arg.
Take fileutils out and just merge the deps into develop.
Merge branch 'features/fileutils-deps' into develop
Add fileutils back in its own branch.