Py3k-friendly dict iterables.
Based on 2to3 -fdict with some manual edits to reduce
materialization where it's unnecessary.
Merge pull request #9 from kimgr/dict_iter

Py3k-friendly dict iterables.
Switch all xrange -> range for Python 3 compatibility.
Merge pull request #11 from kimgr/xrange

Switch all xrange -> range for Python 3 compatibility.