Documentation needed

[notator]

The files http://www.james-ingram-act-two.de/open-source/cmn_core.html and www.james-ingram-act-two.de/open-source/svgScoreExtensions.html need to be written/updated.

cmn_core.html needs to be written from scratch. It is the value of the SVG "data-scoreType" attribute in the AP's scores, and should describe the classes used by the cmn_core SVG specialisation. The cmn_core SVG specialisation is the root class of all cmn (= Common Western Music Notation) scores. The URL is used to tell the client application that the score only uses the cmn_core classes.

svgScoreExtensions.html needs to be updated. It defines the "score" namespace in the AP's scores. The "score" namespace is used to allow the SVG to include temporal information.