Update py-simplejson to 2.1.1.
Based on PR#43447 by Wen Heping.
While here, set LICENSE=mit with some cosmetic fixes.

Version 2.1.1 released 2010-03-31

* Change how setup.py imports ez_setup.py to try and workaround old versions
  of setuptools.
  http://code.google.com/p/simplejson/issues/detail?id=75
* Fix compilation on Windows platform (and other platforms with very
  picky compilers)
* Corrected simplejson.__version__ and other minor doc changes.
* Do not fail speedups tests if speedups could not be built.
  http://code.google.com/p/simplejson/issues/detail?id=73

Version 2.1.0 released 2010-03-10

* Decimal serialization officially supported for encoding with
  use_decimal=True. For encoding this encodes Decimal objects and
  for decoding it implies parse_float=Decimal
* Python 2.4 no longer supported (may still work, but no longer tested)
* Decoding performance and memory utilization enhancements
  http://bugs.python.org/issue7451
* JSONEncoderForHTML class for escaping &, <, >
  http://code.google.com/p/simplejson/issues/detail?id=66
* Memoization of object keys during encoding (when using speedups)
* Encoder changed to use PyIter_Next for list iteration to avoid
  potential threading issues
* Encoder changed to use iteritems rather than PyDict_Next in order to
  support dict subclasses that have a well defined ordering
  http://bugs.python.org/issue6105
* indent encoding parameter changed to be a string rather than an integer
  (integer use still supported for backwards compatibility)
  http://code.google.com/p/simplejson/issues/detail?id=56
* Test suite (python setup.py test) now automatically runs with and without
  speedups
  http://code.google.com/p/simplejson/issues/detail?id=55
* Fixed support for older versions of easy_install (e.g. stock Mac OS X config)
  http://code.google.com/p/simplejson/issues/detail?id=54
* Fixed str/unicode mismatches when using ensure_ascii=False
  http://code.google.com/p/simplejson/issues/detail?id=48
* Fixed error message when parsing an array with trailing comma with speedups
  http://code.google.com/p/simplejson/issues/detail?id=46
* Refactor decoder errors to raise JSONDecodeError instead of ValueError
  http://code.google.com/p/simplejson/issues/detail?id=45
* New ordered_pairs_hook feature in decoder which makes it possible to
  preserve key order. http://bugs.python.org/issue5381
* Fixed containerless unicode float decoding (same bug as 2.0.4, oops!)
  http://code.google.com/p/simplejson/issues/detail?id=43
* Share PosInf definition between encoder and decoder
* Minor reformatting to make it easier to backport simplejson changes
  to Python 2.7/3.1 json module


(obache)