FUEL: font-lock ENUMs
FUEL: highlight predicates
FUEL: colorizing for PROTOCOL and some uncommon parsing words
FUEL: fixed regexp for C-GLOBAL and RENAME
FUEL: correct colorizing for FROM and EXCLUDE
FUEL: improved regexps for setters and getters, now they arent fooled by the parsing words << and >>
FUEL: correct highlighting of GENERIC# and MACRO:
FUEL: improved font-locking of DESTRUCTOR and FORGET
FUEL: correct font-locking of nested stack effect declarations.

The new matcher function isn't "fooled" by stack effect declarations
like: ( ... seq quot: ( ... elt index -- ... ) i -- ... )