[OF control] Merging in Doug's changes

[JuanPi]

I D,

I am trying to merge your changes.
I have added a Makefile to the repository to simplify the
adminstration. I have merged in the differences, but I keep getting
lots of errors. Could you try?
https://bitbucket.org/KaKiLa/octave-control

In particular when I do
make run

and then

test norm

I get
'__lti_input_idx__' undefined

The same for

test impulse
***** test
 t=0:0.1:.3;
 sys=tf(0.9375,[1 2 4])
 y=impulse(sys,t)
 assert (y(1), 0, eps);
 assert (y(2), 0.084405001160727, 2*eps);
 assert (y(3), 0.150460144774958, 2*eps);
 assert (y(4), 0.199104909042133, 2*eps);
!!!!! test failed
'__lti_input_idx__' undefined near line 211 column 30

and indeed I can't find the function.

Also could you add test and ideally demos to the other files you added
(e.g. imp_var)?

Thanks


-- 
JuanPi Carbajal
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