diff: package up extras/complex_numbers

[Fergus Henderson]

This is the first installment of a bunch of changes.  The eventual
intent is to put every major component into its own package -- the
standard library will be in a package `std', the compiler would be in
its own package, the profiler would be in its own package, etc.

But for the moment I'm just going to start with something small
and out-of-the-way just to check that it all works.

--------------------

Use sub-modules to package up the modules in extras/complex_numbers
into a single module.

extras/complex_numbers/complex_lib.m:
extras/complex_numbers/complex_numbers.m:
	Rename complex_lib.m as complex_numbers.m,
	and modify it to use sub-modules.

extras/complex_numbers/*.m:
extras/complex_numbers/tests/complex_test.m:
extras/complex_numbers/samples/fft.m:
	Add `complex_numbers:' to all of the `:- module'
	and `:- import_module' declarations.

extras/complex_numbers/Mmakefile:
extras/complex_numbers/tests/Mmakefile:
extras/complex_numbers/samples/Mmakefile:
	Modify to reflect the renaming from `complex_lib' to
	`complex_numbers'.

-- 
Fergus Henderson <fjh at cs.mu.oz.au>  |  "I have always known that the pursuit
WWW: <http://www.cs.mu.oz.au/~fjh>  |  of excellence is a lethal habit"
PGP: finger fjh at 128.250.37.3        |     -- the last words of T. S. Garp.