Modernize LHCbAlgs

• prefer std::make_unique
• prefer emplace_back
• remove pre-C++11 compatibilty code
• prefer (implicit) std::initializer_list over (explicit) boost::assign
• remove SVN/CVS identifiers
• prefer inheritance from extends<> over explicit virtual inheritance
• prefer (implicit) compiler generated destructors
• prefer direct member initialization
• prefer inheriting constructors
• prefer Gaudi::Property