LIBBASE is no longer used in make so remove it
Rename rules.doc and rules.utils because GitLab treats the former as a MS Word document.Thanks-to: Jed Brown
non-test and tutorial makefiles only need rules.doc not the full rulesCommit-type: documentation
Only makefiles in the test and tutorial directories need lib/petsc/conf/testCommit-type: housekeeping
Remove now unneeded SOURCE* variables from makefilesCommit-type: configure, housekeeping
MatDense CUPM