[mtasc] FreeBSD Build

[Luis N]

Hi, 

Building on FreeBSD didn't work out, with the following as errors: 

> ocaml install.ml -nodoc -d ../ocaml -b -n
ocamlfind: not found
Findlib not found.

> ocamlc extc_stubs.c
extc_stubs.c: In function `executable_path':
extc_stubs.c:128: warning: declaration of `p' shadows a parameter

Compiling the tutorial gives the error:

-bash-2.05b$ bin/mtasc -swf tuto.swf -header 800:600:20 -main Tuto.as
(unknown) : type error class not found : Number

-bash-2.05b$ bin/mtasc-byte -swf tuto.as -header 800:600:20 -main Tuto.as
(unknown) : type error class not found : Number