Update Al-3.enc (added 3 glyphs, renamed 6)

Added Russian ruble (uni20BD) and Turkish lira (uni20BA) symbols, renamed the Scedilla/scedilla uni015E/uni015F, and Scommaaccent/scommaaccent to uni0218/uni0219, and disambiguated the Tcedilla/tcedilla as uni0162, uni0163 (no longer naming them Tcommaaccent/tcommaaccent in addition to the appropriate uni-named glyphs). Also added .notdef glyph, revised header comments.