Added support for non-nek-supplied LAPACK libraries to compile system

git-svn-id: https://svn.mcs.anl.gov/repos/nek5/trunk/nek@982 24248562-e74d-0410-ab4b-d4d80c744c73
separated zero and zero_moab.usr files, pff

git-svn-id: https://svn.mcs.anl.gov/repos/nek5/trunk/nek@983 24248562-e74d-0410-ab4b-d4d80c744c73