Updated licensing

LICENSE.txt

@@ -0,0 +1,13 @@
+This license is the license that determines the terms of using any version of Spintrum up to this one, unless otherwise stated in newer versions.
+
+Spintrum is dual-licensed. You can choose one of the following options:
+
+1. Use Spintrum with the GNU General Public License version 3 (GPLv3) (more information here: https://www.gnu.org/licenses/gpl-3.0.en.html), with an additional clause:
+
+- In case you use Spintrum to produce any work (publication, software, machine, derivative software of any kind, etc...), you are obliged to acknowledge that Spintrum was used in that product.
+
+In case this clause conflicts with other clauses in the GPLv3 license, this clause overwrites any other conflicting terms in the GPLv3 license.
+
+2. As a commercial product: You can contact the authors of Spintrum and describe your requirements for purchasing Spintrum commercially, in which case you receive support and have the option request additional features.
+
+For questions regarding licensing of Spintrum, please contact Samer Afach: [samer [[at]] afach.de].

spintrum/meta.py

@@ -1 +1 @@
-__version__ = "0.2.1"
+__version__ = "0.2.2"

src/Spintrum.cpp

@@ -19,8 +19,8 @@ const char* get_version()
 void print_software_info()
 {
     std::cout<<"Spintrum version "<<get_version()<<". ";
-    std::cout<<"This software is provided under the MPL license. "
-               "For more information, contact Samer Afach: samer@afach.de."<<std::endl<<std::endl;
+    std::cout<<"This software is provided under a license that should have been delivered with its package in the file LICENSE.txt."
+               "For more information, contact Samer Afach: samer [[at]] afach.de."<<std::endl<<std::endl;
 }
 
 /**