Revert "Added kernel dummy package: sample" (no need anymore)

NOTE: kernel/sample/Makefile.am is left as an example but not used anymore

This reverts commit 3074ad70db777694b401b1cd3980f74301b0339d.
Moved old (obsolete) code into '/kernel/old/'

+ cleanup
Moved htmlhelp.* to Singular/ from kernel/ (may be used in some future)
Cleanup scons leftovers
Moved /kernel/{Cache*.h,interpolation.{h,cc},minpoly.{h,cc}} (orig. from /Singular/) to kernel/linear_algebra/
Moved all the outdated  modgen related stuff to /old_modgen/ for now
Removed HAVE_CONFIG guards

fix: fixed the inclusion of configure-generated *config.h's
Updated the package diagramm for /kernel/
Fix pyobject dyn.module

chg: also minor cleanup (and preparation for moving dyn.modules into /Singular/)
Minor header correction
Updated the expected result of Manual/primeClosure (64 linux, with optimizations)

NOTE: also i suggest to add the following to your .git/config:

[diff "gz.uu"]
  textconv = "myf(){ A=`mktemp`;uudecode -o \"$A\" \"$@\" && zcat \"$A\" && rm \"$A\"; }; myf"
  cachetextconv = true
Fix undefined NULL
Merge remote-tracking branch 'origin/spielwiese' into spielwiese.merged