Identification Toolbox: improvements, bugfixes, license, preparation for getting rid of globals

Closes #1694 (closed), #1689 (closed) Improvements for minimal state space system using alternative to minreal function (I still need to provide the mex function from SLICOT, will do so soon or open an issue for this if I fail).

Please also merge into 4.6 branch.

matlab/allVL1.m

@@ -29,7 +29,7 @@ function v = allVL1(n, L1, L1ops, MaxNbSol)
 %    This function can be used to generate all orders of all
 %    multivariable polynomials of degree p in R^n:
 %         Order = allVL1(n, p)
-% Author: Bruno Luong
+% Author: Bruno Luong (brunoluong@yahoo.com)
 % Original, 30/nov/2007
 % Version 1.1, 30/apr/2008: Add H1 line as suggested by John D'Errico
 %         1.2, 17/may/2009: Possibility to get the number of permutations
@@ -38,31 +38,25 @@ function v = allVL1(n, L1, L1ops, MaxNbSol)
 %         1.4, 18/Dec/2010: + non-recursive engine
 
 % Retrieved from https://www.mathworks.com/matlabcentral/fileexchange/17818-all-permutations-of-integers-with-sum-criteria
-
-% Copyright (c) 2009 Bruno Luong
-% 
-% Redistribution and use in source and binary forms, with or without
-% modification, are permitted provided that the following conditions are
-% met:
-% 
-%     * Redistributions of source code must retain the above copyright
-%       notice, this list of conditions and the following disclaimer.
-%     * Redistributions in binary form must reproduce the above copyright
-%       notice, this list of conditions and the following disclaimer in
-%       the documentation and/or other materials provided with the distribution
-% 
-% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-% AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-% IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-% ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
-% LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-% CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-% SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-% INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-% CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-% ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-% POSSIBILITY OF SUCH DAMAGE.
-
+% =========================================================================
+% Copyright (C) 2007-2010 Bruno Luong <brunoluong@yahoo.com>
+% Copyright (C) 2020 Dynare Team
+%
+% This file is part of Dynare.
+%
+% Dynare is free software: you can redistribute it and/or modify
+% it under the terms of the GNU General Public License as published by
+% the Free Software Foundation, either version 3 of the License, or
+% (at your option) any later version.
+%
+% Dynare is distributed in the hope that it will be useful,
+% but WITHOUT ANY WARRANTY; without even the implied warranty of
+% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+% GNU General Public License for more details.
+%
+% You should have received a copy of the GNU General Public License
+% along with Dynare.  If not, see <http://www.gnu.org/licenses/>.
+% =========================================================================
 global MaxCounter;
 
 if nargin<3 || isempty(L1ops)