Internal server error when running tc-viewer from pip installed package

[bluenote10]

When running tc-viewer from a version of tilecloud that is installed via pip install tilecloud the tile server errors with an internal server error:

Error: 500 Internal Server Error

Sorry, the requested URL 'http://localhost:8080/' caused an error:

Template 'index' not found.

The reason is most likely a standard mistake in Python packaging: The packaged wheel is missing the html template, because only *.py ends up in the wheel. Having a quick glance over the wheels on PyPi it looks like they are missing both html templates and bundled tiles.

[sbrunner]

Pull request welcome :-)