#353 Making use of non-void setters
#295 Improving comment
#359 Upgrading to FreeMarker 2.3.21; Updating license.txt
renaming license.txt to LICENSE.txt (part 1 of the renaming dance on Win)
#359 Renaming license.txt to LICENSE.txt, include LICENSE.txt in all distributed jars, retain original freemarker LICENSE.txt and NOTICE.txt in META-INF/freemarker