Modernize TrackTools

• prefer inheriting constructors
• prefer implicit destructors
• prefer Gaudi::Property
• prefer direct member initialization
• prefer standalone functions in anonymous namespace over member functions that do not access any class data and/or methods
• prefer STL algorithms over raw loops
• prefer std::unique_ptr over raw pointers + explicit delete
• prefer switch over if-then-elseif-elseif-else
• prefer range-based for loops
• move loop invariants out of loop body
• remove obsolete SVN/CVS keywords
• prefer auto
• add final
• prefer emplace_back
• prefer inheriting from extends over virtual inheritance
• prefer std::initializer_list over boost::assign
• prefer std::unique_ptr and move semantics over std::shared_ptr and copy
• prefer std::make_unique
• prefer range-based for loops over BOOST_FOREACH
• do not cache msgLevel(MSG::DEBUG)