Add license statement to README.md, fix license statement in ins and …

…dtx file.

README.md

@@ -3,3 +3,9 @@ Tango colors for LaTeX
 
 This package allows to use colors from the Tango color palette (http://tango.freedesktop.org/Tango_Icon_Theme_Guidelines#Color_Palette)
 easily in LaTeX.
+
+This work may be distributed and/or modified under the conditions of the LaTeX Project Public License,
+either version 1.3 of this license or later (at your option) or any version of the GNU Public License.
+The latest version of the LPPL is on http://www.latex-project.org/lppl.txt (version 1.3 or later is
+part of all distributions of LaTeX version 2005/12/01 or later). The latest version of the GPL is
+available on https://www.gnu.org/licenses/gpl-3.0.txt.

tangocolors.dtx

@@ -5,11 +5,14 @@
 % ---------------------------------------------------------------------------
 % This work may be distributed and/or modified under the
 % conditions of the LaTeX Project Public License, either version 1.3
-% of this license or (at your option) any later version.
-% The latest version of this license is in
+% of this license or later (at your option) or any version of the
+% GNU Public License.
+% The latest version of the LPPL is on
 %   http://www.latex-project.org/lppl.txt
-% and version 1.3 or later is part of all distributions of LaTeX
-% version 2005/12/01 or later.
+% (version 1.3 or later is part of all distributions of LaTeX version
+% 2005/12/01 or later).
+% The latest version of the GPL is available on
+%   https://www.gnu.org/licenses/gpl-3.0.txt
 %
 % This work has the LPPL maintenance status `maintained'.
 %

tangocolors.ins

@@ -1,13 +1,17 @@
 %% Copyright (C) 2009 by Daniel G. Siegel <[email protected]>
 %% Copyright (C) 2023 by Hilmar Preuße <[email protected]>
 %% --------------------------------------------------------------------------
+
 %% This work may be distributed and/or modified under the
 %% conditions of the LaTeX Project Public License, either version 1.3
-%% of this license or (at your option) any later version.
-%% The latest version of this license is in
+%% of this license or later (at your option) or any version of the
+%% GNU Public License.
+%% The latest version of the LPPL is on
 %%   http://www.latex-project.org/lppl.txt
-%% and version 1.3 or later is part of all distributions of LaTeX
-%% version 2005/12/01 or later.
+%% (version 1.3 or later is part of all distributions of LaTeX version
+%% 2005/12/01 or later).
+%% The latest version of the GPL is available on
+%%   https://www.gnu.org/licenses/gpl-3.0.txt
 %%
 %% This work has the LPPL maintenance status `maintained'.
 %%
@@ -32,15 +36,14 @@ Copyright (C) 2023 by Hilmar Preuße <[email protected]>
 --------------------------------------------------------------------------
 This work may be distributed and/or modified under the
 conditions of the LaTeX Project Public License, either version 1.3
-of this license or (at your option) any later version or the GNU
-Public License.
-The latest version of the LPPL is in
+of this license or later (at your option) or any version of the
+GNU Public License.
+The latest version of the LPPL is on
   http://www.latex-project.org/lppl.txt
-and version 1.3 or later is part of all distributions of LaTeX
-version 2005/12/01 or later.
-The latest version of the GPL is in
+(version 1.3 or later is part of all distributions of LaTeX version
+2005/12/01 or later).
+The latest version of the GPL is available on
   https://www.gnu.org/licenses/gpl-3.0.txt
-.
 
 \endpreamble