Move ui/, dev/, initug.* to dune/uggrid/*

CMakeLists.txt

dev/CMakeLists.txt

dune/uggrid/CMakeLists.txt

dune/uggrid/commands.cc

dune/uggrid/commands.doc

dune/uggrid/commands.h

dune/uggrid/domain/std_domain.cc

dune/uggrid/gm/algebra.cc

dune/uggrid/gm/cw.cc

dune/uggrid/gm/elements.cc

dune/uggrid/gm/enrol.cc

dune/uggrid/gm/er.cc

dune/uggrid/gm/evalproc.cc

dune/uggrid/gm/evm.cc

dune/uggrid/gm/gmcheck.cc

dune/uggrid/gm/refine.cc

dune/uggrid/gm/rm-show.cc

dune/uggrid/gm/rm-tetrahedron-rules-test.cc

dune/uggrid/gm/rm-write2file.h

dune/uggrid/gm/rm.cc