Still need to handle row numbers correctly

Includes a hacky fix to skip ignored values and a temporary hardcoding
of the sheet profile.

normalize_row doesn't really need to dealw ith None
and theres a slightly more elegant way to calculate row numbers

Google CSV to XLSX conversion results in dates being stored as date objects
rather than strings, so we need to cope with these

Conflicts:
	django/website/templates/base.html

http://doughellmann.com/2012/11/12/the-performance-impact-of-using-dict-instead-of-in-cpython-2-7-2.html

Because not all sources might offer one

Resolved conflicts:
	django/website/local_settings.py.jenkins