tree added to client, multiple attachment bug also patched

almost nothing changed but server now sends ModuleAdd packet

so heres module attachment and movement, but its a little broken and also squishy joints and also no tree on the client

one time i heard that the base for module manipulation is good

deleting all attached modules implemented

rotation bug vanquished, but preattached modules still exist (please remove)

Merge remote-tracking branch 'origin/master'

# Conflicts:
#	server/src/handler.rs

put part of module logic in module.rs