imports on the JSON module the other way around

[brunobord]

Things look a bit strange at:

https://github.com/dsc/bunch/blob/master/bunch/__init__.py#L286-L290

I think the imports should be the other way around:

• try to import simplejson as json
• if it succeeds, you're fine
• if it fails, you'll fallback to the stdlib module json, which should be available on your Python install.

[dsc]

The point was to accommodate versions of python that didn't ship with json. In 2.6, the simplejson library was adopted as json -- the project still has compat back to 2.2.