[common] adds indexset based partitioner
[test.main] update info and exception switches
[grid.walker] added files from dune-gdt
[grid.walker.wrapper] use correct type
[grid.walker] moved ApplyOn to separate header
[profiler] synchronize startTiming
[cmake] adds TBB discovery
[cmake] cleanup obsolete finds
[common.crtp] added non-static variants of as_imp()
[tests] adds one for Walker
[cmake] fixes tbb debug mode linking
[cmake] only set -Og if compiler supports it
[cmake] shuffles -O0 around
[common] experimental TBB threadmanager impl.
[common.configuration] actually honor the overwrite flag in add()
[cmake] define ENABLE_ALUGRID unconditionally if alugrid was found
[common] fixes PerThreadValue accumulate
[cmake] move macro around
fixes a few deprecated header/unused param warnings
[grid] adds ICC workaround in Walker::walk_range