Simplify setup.py to work for Py3.x
Use os.walk instead of os.path.walk.
Skip indexing tests in Py3.x.
Don't include clang in Py3.x because it doesn't work!
Get hellomodule to compile with Py3.
Get reader tests running for Py3.

Added a copy of indexed DB for tests to run in Py3.
Install console script only in Py2.x.
Prevent import of the writer in Py3.x.
Change indexer to be able to index Py3 code.

new: PyModuleDef
changed: PyObject_HEAD_INIT
Fix copy paste bug in test class name.
Allow setting version when indexing Python sources.

Try to use the closest match for a version, when looking for available
indexed sources.

Fixes #6.
Use the Python version to be default version for indexes.
Bump up version to 0.2.