* eval.c (me_quasilist): New static function.

(eval_init): Register me_quasilist as quasilist macro expander.

* lib.c (quasilist_s): New global variable.
(obj_init): quasilist_s initialized.

* lib.h (quasilist_s): Declared.

* match.c (do_txreval): Handle quasilist syntax.

* parser.l (QWLIT): New exclusive state.
Extend lexical grammar to transition to QWLIT state upon
the #` or #*` sequence which kicks off a word literal,
and in that state, piecewise lexically analyze the QLL,
mostly by borrowing rules from quasiliterals.

* parser.y (QWORDS, QWSPLICE): New tokens.
(n_exprs): Integrate splicing form of QLL syntax.
(n_expr): Integrate non-splicing form of QLL syntax.
(litchars): Propagate line number info.
(quasilit): Fix "string literal" wording in error message.

* txr.1: Introduced WLL abbreviation for word list literals,
cleaned up the text a little, and documented QLL's.

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