Update Trove specifiers to include Python 3.4

Declare support for the 3.4 release of Python though the PyPI trove
classifier for this interpreter.
Update Trove specifiers to mark beta release

Update package stability level as beta for next release.
Update CHANGELOG and version for 0.9 release

Increment version number to 0.9 and set date for 0.9 release in
CHANGELOG.