Add license clarification and authors file

Closes #12

AUTHORS

@@ -0,0 +1,2 @@
+Nirenjan Krishnan
+Ryan Drake

LICENSE

@@ -0,0 +1,19 @@
+X52Pro-Linux is licensed under the terms of the GNU General Public License with
+the following clarification and special exception.
+
+Linking this module statically or dynamically with other modules is making a
+combined work based on this module. Thus, the terms and conditions of the GNU
+General Public License cover the whole combination.
+
+As a special exception, the copyright holders of this module give you
+permission to link this module with independent modules to produce an
+executable, regardless of the license terms of these independent modules, and
+to copy and distribute the resulting executable under terms of your choice,
+provided that you also meet, for each linked independent module, the terms and
+conditions of the license of that module. An independent module is a module
+which is not derived from or based on this module. If you modify this module,
+you may extend this exception to your version of the module, but you are not
+obliged to do so. If you do not wish to do so, delete this exception statement
+from your version.
+
+The terms of the GNU General Public License may be found in the file COPYING.