DART 4.3.0

• Added name manager for efficient name look-up and unique naming
• Added all-inclusive header and namespace headers
• Added DegreeOfFreedom class for getting/setting data of individual generalized coordinates
• Added hybrid dynamics
• Added joint actuator types
• Added Coulomb joint friction
• Migrated to C++11
• Improved readability of CMake output messages
• Fixed const-correctneess of member functions