Please see release.notes. Fix volume manager issue with specail placement reuse. Fix volume ids exceeding 32 bits

Fix hundreds of std=c++11 compiler warningsAllow to change compiler settings in cmake/DD4hep.cmake valid for all packages.Watch out for CMAKE_CXX_FLAGS in cmake/DD4hep.cmake.Move to use Boost spirit::phoenix version 3. ---- Prepare for ROOT 6

No code changes. Common code formatting removing tabs, replacing with spaces (tab-size=-2) + emacs reformatting.

Remove materials from LCDD. Look them directly up in the TGeoManager instance and avoid double caching.