Web-py

* <strong>security fix:</strong> prevent bad characters in headers
* support for cheetah template reloading
* support for form validation
* new `form.File`
* new `web.url`
* fix rendering issues with hidden and button inputs
* fix 2.3 incompatibility with `numify`
* fix multiple headers with same name
* fix web.redirect issues when homepath is not /
* new CherryPy wsgi server
* new nested transactions
* new sqlliteral

* New functions `found`, `seeother`, and `tempredirect` now let you do other kinds of redirects. `redirect` now also takes an optional status parameter. (tx many)
* New functions `expires` and `lastmodified` make it easy to send those headers.
* New function `gone` returns a 410 Gone (tx David Terrell).
* New function `urlquote` applies url encoding to a string.
* New function `iterbetter` wraps an iterator and allows you to do __getitem__s on it.
* Have `query` return an `iterbetter` instead of an iterator.
* Have `debugerror` show tracebacks with the innermost frame first.
* Add `__hash__` function to `threadeddict` (and thus, `ctx`).
* Add `context.host` value for the requested host name.
* Add option `db_printing` that prints database queries and the time they take.
* Add support for database pooling (tx Steve Huffman).
* Add support for passing values to functions called by `handle`. If you do `('foo', 'value')` it will add `'value'` as an argument when it calls `foo`.
* Add support for scgi (tx David Terrell for the patch).
* Add support for web.py functions that are iterators (tx Brendan O'Connor for the patch).
* Use new database cursors on each call instead of reusing one.
* `setcookie` now takes an optional `domain` argument.
* Fix bug in autoassign.
* Fix bug where `debugerror` would break on objects it couldn't display.
* Fix bug where you couldn't do `include`s inline.
* Fix bug with `reloader` and database calls.
* Fix bug with `reloader` and base templates.
* Fix bug with CGI mode on certain operating systems.
* Fix bug where `debug` would crash if called outside a request.
* Fix bug with `context.ip` giving weird values with proxies.

* <strong>Backwards-incompatible change:</strong> `db_parameters` is now a dictionary.
* <strong>Backwards-incompatible change:</strong> `sumdicts` is now `dictadd`.
* Add support for PyGreSQL, MySQL (tx Hallgrimur H. Gunnarsson).
* Use HTML for non-Cheetah error message.
* New function `htmlquote()`.
* New function `tryall()`.
* `ctx.output` can now be set to a generator. (tx Brendan O'Connor)

* First public version.

* new: replace print with return (<i>backward-incompatible</i>)
* new: application framework (<i>backward-incompatible</i>)
* new: modular database system (<i>backward-incompatible</i>)
* new: templetor reimplementation
* new: better unicode support
* new: debug mode (web.config.debug)
* new: better db pooling
* new: sessions
* new: support for GAE
* new: etag support
* new: web.openid module
* new: web.nthstr
* fix: various form.py fixes
* fix: python 2.6 compatibility
* fix: file uploads are not loaded into memory
* fix: SQLLiteral issue (Bug180027)
* change: web.background is moved to experimental (<i>backward-incompatible</i>)
* improved API doc generation (tx Colin Rothwell)