Licensing clarification

 * move the images to an images subfolder of the qml compositor
 * create two license files, one for the APACHE 2.0 license and one for the CC-By-SA-NC license
 * detail what license applies to what file in the COPYING file

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>
Merge pull request #16 from webOS-ports/tofe/licensing

Licensing clarification