Move root forms in morph.lexc to lexicon/.

    Some closed class lexical items (e.g., clitics) and lexical items
    that are defined using finite state automata (e.g., numbers) were
    defined in morph.lexc.

    This change moves them to lexicon/, where they belong. morph.lexc
    now contains the definition of the affixing process.
Integrating some work on unknown word guesser.

    This includes a relatively big change integrating an earlier
    effort of `word guesser' implementation. The idea is to allow
    (almost) any sequence of symbols of the alphabet to be a stem (of
    on open-class lexical item). It requires some more work, and
    includes additional code which makes use of C preprocessor to
    optionalize some of the behavior like capitalization.

    Currently, guesser is a standalone automaton, but it can be
    combined with the analyzer with priority union, or the default
    lexicon and the guesser lexicon may be combined (again with
    priority union) within the analyzer.