setup.py: Add templates as package_data

We want to install these for Django's app_directories.Loader [1], so
add them as package_data [2,3].  Since Python 2.7/3.1, files listed in
package_data no longer need to be listed in the MANIFEST.in [2,3].

[1]: https://docs.djangoproject.com/en/dev/ref/templates/api/#django.template.loaders.app_directories.Loader
[2]: http://docs.python.org/2/distutils/setupscript.html#installing-package-data
[3]: http://docs.python.org/3/distutils/setupscript.html#installing-package-data
Bump to v0.3

Packaging fix for template installation.

Changes since v0.2:
* setup.py: Add templates as package_data