transform require directives since wsapi not used clause module anymore

wsapi don't use module() anymore

lua 
Lua 5.1.4  Copyright (C) 1994-2008 Lua.org, PUC-Rio
> require "orbit"
/usr/share/lua/5.1/orbit.lua:459: attempt to index global 'wsapi' (a nil value)
stack traceback:
	/usr/share/lua/5.1/orbit.lua:459: in main chunk
	[C]: in function 'require'
	stdin:1: in main chunk
	[C]: ?