- My French translations, however bad, were still for Megabudget so I
updated them.
- Figured out a bit what it will take to be able to post expenses even
when offline.
Offline updates are working much better. This required changing around
the default spreadsheet adapter so that when adding a number it only
takes a URL for the spreadsheet, then later on when posting the number
to the spreadsheet, it must actually have the spreadsheet service. 


Huh, I wonder if it's possible to add a number with an empty URL?
Yet more internationalization! (French)
I hadn't properly updated the text that was shown when the properties
list is looking for all available spreasheets.
Added WARNING.txt. We're dealing with people's data here, so we want
them to know the risks involved.
Some limited support for spreadsheets without 'number' and 'date'
headers! If the spreadsheet is completely empty, we add those headers
before adding an expense. We could do much more here, but I'm pretty
happy with things as-is and I want to release my first version soon.