Remove call to FillInVersion()

The GAP kernel function FillInVersion() does nothing, and has been like that for quite some time.
Get rid of CVS keyword $Id$
Update 3rd party m4 files to latest version
Fix broken m4 files
Change AM_INIT_AUTOMAKE to use 'foreign' flag
Do not store these generated files in repository
Remove more generated files: Makefile.in
Update .gitignore
Merge pull request #5 from fingolfin/cleanup-cvs

Cleanup CVS leftovers
Merge pull request #6 from fingolfin/fix-buildsys

Fix buildsys
Fixed compile problem with long long to cxsc::real conversion; new configuration by Max Horn; version bump to 0.6.0
Forgot some improvements: ROOT_CXSC returns [] not fail on constant polynomial
Fixed configuration: now forbids extern