updated gap & libgap to 4.5.6
moved gap_packages to new build system, deleted braid package
provide a spkg-check to run the libgap testsuite
checked in the build scripts for the database_gap spkg
fix typo in version number
Merge remote-tracking branch 'trac/u/vbraun/gap-4.6.5' into gap_4_7_2

Conflicts:
	build/pkgs/gap/checksums.ini
	build/pkgs/libgap/checksums.ini
update to gap-4.7.2
upstream merged Jeroens cflags patch
udpate to libgap-4.7.2
Updated checksum for libgap spkg.
fix doctests in the gap interface
add atlasrep to database_gap (dependency for tomlib)
fix doctests: different gap generator orders
also fix long doctests
Merge branch 'public/groups/fp_groups-15145' into public/ticket/15582

Conflicts:
	src/doc/en/constructions/groups.rst
Merge remote-tracking branch 'trac/develop' into t/15582/public/ticket/15582
remove duplicated changelog
add SPARC alignment fix
apply sparc patch also to libgap
fix trivial doctest failure