R: resize meth in MMapWrapper improved.
DDBaseSet and tests added.
____ asorted changes.
B: fix DDField. Benchmarks and testes changed.
C: benchmarks expanded.
C: benchmark test added in Tests.
F: BaseSet optimization
F: BaseSet optimization part2.
R: DDBase set interface adjustments.
DDDeleteField improvements.
R: gpl text included.
R: unused files removed.
Merge branch 'develop'