Tamzen-1.11.4

• GH-9: ensure *.fnt embedded font names are unique.
• GH-10: Powerline infused BDFs need ISO10646 charset.
• Drop *.fon files: they don't work under Windows 7.
• Drop *.pdb format: Palm OS officially died in 2009.
• Drop *.otb format: they're redundant with *.bdf.