Release 0.8.5: move to STIX fonts 1.x

Release 0.8.4: move to STIX fonts (from STIXbeta)

Release 0.8.3: removed all references to DTDs
	       no longer output DOCTYPE declarations
	       fixed (or papered over) bug that caused gaps
	         in horizontally stretched, composed glyphs

Release 0.8.1: fixed two bugs:
	       - removed illegal "tunnel" stylesheet parameter attribute
	       - fixed baseline problem revealed by examples/primes*.xml

Release 0.8: major leap; beta status

Release 0.1: initial release
