Simplejson

* Fixes reference leaks in the encoding speedups (sorry about that!)
* Fixes doctest suite for Python 2.6
* More optimizations for the decoder

* Fixes MSVC2003 build regression
* Fixes Python 2.4 compatibility in _speedups.c

* Fixes long encoding regression introduced in 2.0.0
* Fixes MinGW build regression introduced in 2.0.0

* optimized Python encoding path
* optimized Python decoding path
* optimized C encoding path
* optimized C decoding path
* switched to sphinx docs (nearly the same as the json module in python 2.6)

* Decoding is significantly faster (for our internal benchmarks)
* Pretty-printing tool changed from simplejson to simplejson.tool for better
Python 2.6 comaptibility
* Misc. bug fixes

* Rewrote test suite with unittest and doctest (no more nosetest dependency)
* Better PEP 7 and PEP 8 source compliance
* Removed simplejson.jsonfilter demo module
* simplejson.jsonfilter is no longer included