Initial Python 3.3 support
Python 2.6 `assertIn` backport
gitignore: ignore KDevelop4 files

* Adds ignore wildcars for KDevelop4 specific
  project files.

Signed-off-by: Samuele Kaplun <samuele.kaplun@cern.ch>
Completed Python 3.x support

* Completes support for Python 3.x, while retaining
  back-ward compatibility for Python 2.5 onwards
  by using the six module. (closes #3)

Signed-off-by: Samuele Kaplun <samuele.kaplun@cern.ch>
intbitset v2.1

Signed-off-by: Samuele Kaplun <samuele.kaplun@cern.ch>
Merge pull request #6 from kaplun/python3

Python3