A first pass over m3d

[robojumper]

• Adjusts nw4r/g3d includes to work like the others
• Implements some of the known m3d symbols and classes
• Cautiously matches our first dAcObjBase subclasses in RELs that use some m3d stuff

[elijah-thomas774]

Only a couple functions left in m_bmdl.cpp and m_bline.cpp. Ill get to bline later, but bmdl may need to wait until more information of the nw4r and egg code it references