Loads of build chain fixups from Sebastian

Loads of build chain fixups from Sebastian

* merges:
  cosmetics, list Installation and cpuid in distclean-local hook
  fix, comb out double-/ hiccups in invocation-{name,directory}
  chore, bldchn, remove dump file upon make uninstall
  chore, major, do not include dump id in dump file name
  Summary: minor, bring back dist targets Keywords: bldchn dist doc
  doc, fix, do not use structure (@unnumberedsec) inside @enumerate
  chore, mention src/sxemacs in gitignore fully qualified
  doc, fix, do not use @heading in @enumerate
  chore, list ALL texi files in info/ and subdirs
  fix, do not use @anchor in structuring commands
  chore, remove TEXI2DVI redefinitions
  chore, mention build chain .el files in lisp's Makefile.am
  chore, mention headers needed for the ase-set emod
  chore, move systty.h to src/ui/TTY/
  chore, put sxe-utils.h into distribution
  chore, remove VPATH fiddling from sxe-srctree.m4
  chore, don't mention non-existing files in Makefile.am's
  chore, name ase-resclass-test.el correctly
  chore, don't mention non-existing files in Makefile.am's