LNUM patch revised for Lua 5.1.4

[Asko Kauppi <askok@...>]

http://luaforge.net/projects/lnum/

The LNUM patch allows easy and wide configuration of Lua number types,  
with the use of simple compiler defines. It provides added integer  
accuracy (32- or 64-bit), enhances speed on non-FPU systems and allows  
use of complex numbers (C99 required).