Symlinks don't work.

Change function to "startit". This seems to get the demo page to work
under IE 9 (slowly though).

Push out some more data files and move the existing ones in the data/
subdirectory. This is in preparation for adding some detailed
performance notes to the wiki with links to these data files.

Add data_raw.js and webkit_canvas_bug.html that demonstrates the
webkit canvas rendering bug.

Put captions below images.