Computer Modern Unicode fonts 0.6.3a released

Bug fixes:
- wrong ucircumflex and udieresis in CMUTypewriter-Regular,
CMUTypewriter-Oblique, CMUTypewriter-LightOblique
- wrong advanced width of U+044F in CMUSerif-Italic
- empty M in CMUSansSerif-Oblique
- changed encoding of U+2116 in *.enc files