Add master object & rework 2d relative hit projection

[xavierpok]

Does the following :

• Adds a master to each object that should reasonably be hit by a raycast
• Changes the names of most objects to be more human readable (e.g. the wall facing the negative Z direction wac changed from m_wall_4 to NegZRedWall)
• Adds reporting of this new hierarchical structure to the name (e.g. the above is now is NegZRedWall_RedPillar)
• Changes how 2d offset is calculated to be more general (Being able to handle odder angles now)
• 2d offset now also calculates with respect to center of object's master