SRFI-144 - initial port

[Diego]

Hi all,

I've created an initial port of SRFI-144 that passes test-new-egg with 
release-info here:

https://code.dieggsy.com/srfi-144/plain/srfi-144.release-info

I'm thinking a next step might be to test the procedures with C equivalents in 
CHICKEN and see if it'd be best to switch to those. Currently, only the two 
procedures stated in the SRFI document are using the FFI, but I'm not sure if 
the claims made about Larceny hold for us as well.

- Diego