tagged v0.6d and updated version to 0.6e
Timestampled 0.6d release in ChangeLog
Added c2d functionality for MIMO state-space systems; both in matlab mode
and for python mode; added tests for same
added a more complex test case to the matlab code. This test case was
actually hit upon by one of my students, the control/numpy combination
resulted in phase margin detected near omega=0
Updated the function overview in Matlab, to match some added functions
extend comments for root-locus procedure
Slightly increase the epsilon value for margin computation frequency, 
many type 2 systems (on Windows, 32 bit pythonxy, but not on 64 bit Linux
which I tested on) got cross over margins calculated at frequencies 
around 1e-11
Correction to the gain margin calculation. Old implementation also returned
gains where arg(H) == 0. 
Switched around the w_180 and wc return parameters, to match the order
of gain margin (matching w_180) and phase margin (matching wc) return.
corrected comments on time responses, with the "input" parameter to be
ignored on initial response calculation; initial response does not depend
on input!
DOC TRIV: documented move to github
Fixed import for timebase in statesp.

Signed-off-by: Clancy Rowley <cwrowley@princeton.edu>
Added missing module scope for warn in statesp.

Signed-off-by: Clancy Rowley <cwrowley@princeton.edu>
Numpy array style access to state-space subsystems.

Signed-off-by: Clancy Rowley <cwrowley@princeton.edu>
Updated testing suite to work with nosetests.

This required doing chmod -x * to remove executable permissions on
the scripts. I renamed test_all.py to run_all.py so nosetest wouldn't
attempt to run it as a test if someone made it non executable.

Signed-off-by: Clancy Rowley <cwrowley@princeton.edu>
Move src to control.

Makes nosetest use local module instead of installed.

Signed-off-by: Clancy Rowley <cwrowley@princeton.edu>
xferfcn.py pep8 formatting

Conflicts:
	control/xferfcn.py

Signed-off-by: Clancy Rowley <cwrowley@princeton.edu>
Ignore generated files

Signed-off-by: Clancy Rowley <cwrowley@princeton.edu>
Merge branch 'master' into jgoppert
Move tests to control/tests
Add standard Numpy testing

setup.py and runtests.py taken from SciKit example at
http://scikits.appspot.com/example