pep8ify
Minor refactor, add setup.py and stupid test
Add support for colspans in grids
Tweak import order
Additional code formatting improvements
Remove dead variable
Add simple fixture
Big refactor to avoid leaving tempfiles accidentally

The new behaviour is to ensure that we only overwrite
the old files if the new ones were generated without
an exception being raised.

The new structure is more amenable to testing, too.
Big refactor to simplify the internal API
Remove make_temp_file, ensure world readable
Merge pull request #44 from scraperwiki/colspans

Add support for colspans in grids