Add tofu.ttf and provide options to select algorithm and sample text

Tofu.ttf is by Behdad. But at this point of time, it does not work since
otf sanitiser fails to sanitise.

See https://groups.google.com/forum/#!topic/fonttools/JR1yvwyHj-I
Merge remote-tracking branch 'origin/master'

Conflicts:
	tofu.ttf
	tofu.ttf.base64
	tofu.ttx