Pika 0.8.0

Pika version 0.8.0 is now in the mercurial repository. As always binaries for Mac OS X and Windows will be released in the coming days. Along with a zip archive of the source code.

Whats New:
* Keyword Arguments
* General bug fixes
* Couple of rare bugs were found and squashed
* Improved LocalsObject
* class and package statements will no longer reopen existing classes/packages. See the mercurial commit message for changeset 125 to find out why its important.