remove whitespace at end of lines
just because it makes me crazy :-)
first cut at adding notes for slides

notes are separated from slide content by *** on a line by itself
you can also add a title for a slide by using a line starting with %
	titles can be useful in notes files to better know where you are
	titles are not necessary; default title for a slide is "slide #X"
	titles will be used in the table of contents for the HTML version
notes are placed into a separate notes.txt file
notes can include transitions (lines starting with +) just like slides
	transitions should correspond to the slide transtions
	probably need to add something to make sure that's true
tweaks to the HTML version to accomodate notes
	slide content is now larger, and has a border (looks more like a term screen)
	notes are small text underneath
	notes will have some basic HTMLization
		basic paragraphing
		convert *text* to <b>text</b> (like most wikis)
		convert _text_ to <i>text</i> (like most wikis)
		convert `text` to <code>text</code> (like GitHub)
		very simplistic bullet list recognition
		-- to HTML em dash entity
		use non-breaking space before ellipses