Changes in Brython version 2.0.rc1-20140112-155350
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Backwards-incompatible change
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For the sake of namespace isolation, by default, the name of functions and classes defined in Brython are no more available in Javascript global namespace. As a consequence, functions can't be called as event callbacks from HTML tags. For instance, if a function echo() is defined in a Brython script, the following inline code :

    <button onclick="echo()">

will result in a Javascript error such as "name echo is not defined" when the button is clicked

The solution is to define the event callback inside Brython code. The button must have an id :

    <button id="echo">

and the Brython code must include the line

    doc["echo"].bind("click",echo)

Alternatively, to force the name "echo" into the global Javascript namespace, add it as an attribute of the window object :

    from browser import window
    window.echo = echo

Features
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- namespace isolation : in previous versions, the names defined in Brython core scripts were included in the global Javascript namespace, raising risks of conflict with names defined in Javascript programs or libraries. In this version, the only names included in the global Javascript namespace are __BRYTHON__ (used internally) and brython(), the function called on page load
- add base code for CORS solution (cross domain Ajax requests)

Demos
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- add drop files demo (by Glenn Linderman) and French Python course (using module slideshow) to the gallery

Imports
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- improved version of py_VFS.js by Billy Earney. py_VFS compiles the standard library to make imports faster. Now packs Python source with JSON instead of base64

Built-in modules
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- browser : add attributes "window" and "document" as alias of respectively "win" and "doc"
- add a module browser/slideshow for PowerPoint-like slideshows in Brython, using a custom file format

Bug fixes
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- issue #174 : string format character % has wrong precedence
- issue #175 : Functions should return None by default
- issue #183 : re.findall() broken
- function definions must be evaluated only once, upon function definition
- bug with del a[:]
- bug with dir() called without arguments
- bug in map()

Documentation
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- updated with the changes introduced in this version
- add documentation for the built-in module javascript
- translation in Spanish updated by Kiko Correoso