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

beamerThemeOtagoPlain Squashed 'beamerthemes/' changes from d682691..e14d33c 6 months ago
beamerthemeOtago Squashed 'beamerthemes/' changes from eb14121..2d36aa0 8 years ago
beamerthemenzcs Squashed 'beamerthemes/' content from commit eb14121 8 years ago