Em-aiml

- The filename inside Learn tags can now contain wildcards. Besides
simplifying the loading of multiple files, this allows the possibility
of loading AIML files that may not exist without crashing the
interpreter.
- Attempting to set the value of a predicate in a nonexistent session
now automatically creates the session, instead of silently doing nothing.
- "set" tags now output the new value of the variable, as well as assigning
it.

- Unknown AIML tags are handled in a more forgiving fashion. If an
unknown tag is encountered, instead of ignoring its contents entirely,
the contents are processed and returned unaltered.
- Added support for "bot name='name'" tags, both in patterns and in
templates. This also fixes a nasty infinite loop crash when a user
says Hello to a bot.

- Added support for "star" and "sr" tags.
- Considered adding support for the "secure" tag, but decided against it.
see SUPPORTED_TAGS.txt for more information.

- Cleaned up AIML processing code to remove some unnecessary
special-cases in the interpretation algorithm.
- Added support for "input" and "that" tags.

- 50% speedup in Kernel.loadBrain() and Kernel.saveBrain().
- The optional 'learnFiles' and 'commands' arguments to
Kernel.bootstrap() can now be either strings or lists. This
allows multiple files/commands to be loaded during
initialization.
- Added support for "person" and "person2" tags.
- Added general word-substitution functionality. This opens up
the potential for localizing PyAIML into non-English languages.
See DefaultSubs.py for more info.

- Initial release.