Add a new attribute `ignore-blanks' to <test>.
When this is set to "true", any blanks in the string will be ignored
on comparison. This takes effects for compare="eq" or "not_eq" only.
Also changed the behavior of the comparison on <alias> too.
Most of the remaining elements in fonts.conf have been moved to separate
files. The numbering scheme for conf.d files has been documented in the
README and the files have been renumbered. Config files have been
validated against the DTD and a few minor errors fixed.