Revert "Adapt importing of configparser for python 3.2+"

This reverts commit 4f4420b4518fb11a0821a7964d5039a74e567e19.
Revert "Use items() instead of iteritems() with dicts"

This reverts commit 673f7865b04b1ca81d8224c66224a6056e6e3f7c.
Adapted changes to fit python 2.7 better.
Add myself to AUTHORS.rst.