v3.1

Important to note when upgrading:

• If your code calls ObjectIsInvisible(obj), change it to ~~TestScope(obj)

Changes in functionality:

• Added a PunyInform Quick Reference document.
• Implemented the grammar property as described in DM4.
• Added support for ParseNoun, at a small cost if you use it, and no cost if you don't. Note: This is called before parse_name, unlike the standard library.
• Remove duplicates from match list when player specifies same object twice for a multi token.
• Removed ObjectIsInvisible routine which is not needed. Use TestScope instead.
• Added UNDO to end of game message.
• Changed so library doesn't check if header says it's a timed game before updating time, if STATUSLINE_TIME has been defined.
• Added documentation on ParseToken to manual
• Added more debugging tips to Game Authot's Guide

Optimizations:

• Optimized _CheckNoun to save 70 bytes.
• Optimized disambiguation code to save ~70 bytes.
• Optimized code order to let virtual memory systems shift out parts of the library for long times, for speed.

Bugfixes:

• Fixed two incorrect direction names in howto/custom_directions.inf.
• Fixed noun/second setup for Consult, Answer and Ask action.
• Fixed so we don't risk duplicates in scope when InScope is used.
• OPTIONAL_GUESS_MISSING_NOUN function would sometimes reveal a concealed object.
• When parse_name returned -1 wn was not reset.
• Fixed error reporting from ParseToken with TT_SCOPE parameter.
• Fixed that actions sometimes didn't print a message in large games.
• Fixed compile-time error if SACK_OBJECT and OPTIONAL_NO_DARKNESS were defined.
• Fixed a bad noun flag test in _CheckNoun.
• Fixed bad num_words value after disambiguation question.
• Fixed error reporting from general parse routines.
• Fixed bug in scope routines that match multiple nouns.
• Fixed that a direction instead of a disambiguation reply didn't work.
• Fixed so that setting parser_action = ##PluralFound in parse_name works as it should.