Python-aiml

- Fixed bug in AimlParser creation, if the aiml module was not in the same
directory as the script that imported it.
- Improved Unicode support (again) (thanks to Daniel Kottow for his help).
- 2nd pass at documentation. All functions now have useful, properly-formatted
docstrings.

- Reworked the way AimlParser objects are created, to allow support for
XML namespaces in a future version.
- First pass at Unicode-proofing the whole system, so that multi-lingual
AIML files can be processed.
- Added support for "index" attribute in "star", "thatstar" and "topicstar"
elements (thanks to Robert D. Cotey for the patch!). Also added type-check
to ensure that the value of the "index" attribute is an integer.

- Added protection against infinite AIML recursion.
- Removed the deprecated Kernel.getBotName and Kernel.setBotName functions.
- Added workaround for Unicode input crash. Feeding the Kernel Unicode
input no longer crashes the interpreter, but some internal input-formatting
operations must be skipped, which could cause some nonsensical replies
(like you're not already used to nonsensical replies, though...)

- "system" elements now attempt to intelligently convert between UNIX-style
and Windows-style pathnames as appropriate. For cross-platform compatibility,
all AIML files should use UNIX-style paths inside their "system" elements.
- Fixed crashes under Windows9X when a "system" element is executed when
w9xpopen.exe is unavailable.
- Re-piped most errors and warnings to go to stderr instead of stdout.
- Fixed bug that would cause the the bot to stop responding to any input in a session
if the "that" or "topic" strings were 100% whitespace (but still not empty).
- Fixed bug that would cause multi-line "that" strings to become corrupted. For
example, "Hello there.\nNice to meet you" would become "HELLO THERENICE TO MEET
YOU" when queried for that-matching.

- Removed support for non-standard "mode" attribute in "system" elements.
It just wasn't worth breaking the AIML standard for.
- Reworked persistent session support (I warned you!). The old method involving
Kernel.persistentSessions() has been removed. Instead, there is a new
Kernel.getSessionData() method which gives the bot author access to the session
data. You can store this data however you wish. Session data can be restored
later by repeated calls to Kernel.setPredicate().
- Improved AIML parser error handling; instead of aborting the entire file, a
parse error now only ignores the current category and forges ahead. To check for
parse errors, check the return value of AimlParser.getNumErrors() after parsing.

- Further improved AIML parsing; missing or invalid XML attributes are now
detected at parse-time. There's also a first stab at support for Forward
Compatibility Mode: if the "version" attribute of an AIML tag is not 1.0.1,
the parser is much more forgiving of unknown or missing XML tags and attributes.
- Added "support" for the 'gossip' tag. The specific behavior of this tag is
totally undefined; currently, the PyAIML implementation treats it as a big
no-op. Its contents are ignored, and it returns the empty string (but at least
it isn't flagged as a syntax error!)
- Oops; I've implemented 'person' as 'person2' and vice versa this whole time!
Swapped them back; they should each behave correctly now.
- A bit of code cleanup, with an emphasis on using proper XML/AIML terminology
whenever possible.
- Fixed some exception-masking in the 'condition' element processor, which could
prevent AIML parse errors from being reported.
- Added full support for the "bot" tag (previously only the 'bot name="name"'
form was supported). Bot predicates are set using the Kernel.setBotPredicate()
function. Note that Kernel.getBotName() and Kernel.setBotName() have been
deprecated, and will disappear in a future release.