DOC: Add note about patented code to the introduction.

Add a note about patented code to the introduction.

Author: Jon Haitz Legarreta

SoftwareGuide/Latex/Introduction/Introduction.tex

@@ -30,6 +30,10 @@ \chapter{Welcome}
 discussions. Please feel free to contribute your ideas through the ITK
 community discussion.
 
+The Insight Toolkit is built on the principle that patents are undesirable in
+an open-source software. Thus, the community strives to keep the Insight
+Toolkit free from any patented code, algorithm or method.
+
 \section{Organization}
 \label{sec:Organization}