Fix object duplication bug (at least in the most reproducible UFO case)
Remove vector metatable setting

This not only makes the vector functions faster, but also makes them more
consistent with other functions.
Add sanity checks to vector functions
Masterserver update
Masterserver totals fix
Move new core devs to the "Core Developpers" section of mainmenu.
Raise the maximum node limit to 0x7fff

As agreed to by kahrl