Various teaching-related LaTeX files, including several independent LaTeX repositories as subtrees

latest commit ed48bfb4f3 Nigel Stanger authored on 2 May
	beamerThemeOtagoPlain	Squashed 'beamerthemes/' changes from 374b650..d682691	6 months ago
	beamerthemeOtago	Squashed 'beamerthemes/' changes from eb14121..2d36aa0	8 years ago
	beamerthemenzcs	Squashed 'beamerthemes/' content from commit eb14121	8 years ago