Anyjson

* Fixed bug 3
* Fixed bug in benchmarking script

* Fixed bug 2. Installation failed if there were noe compatible json
implementations installed, because the module was loaeded, and threw import
exception during the install process.

* Fixed bug that rendered the lib uninstalleable with easy_install if there
was no supported json module allready installed

* Added exception handling so that all supported modules will result in the
same exceptions being thrown. The exceptions are the same that are used
by the JSON module from python 2.7, TypeError for serialize and
ValueError for deserialize.
* '''NOTE''' API changed. the implementation property is now an object, not
a string
* Rewrote module loading code, so it's now easier to add and rearrange
JSON modules

* Added benchmarking script
* Added support for more serializer modules

* Initial release