= Stop… Camping Time ToDo list

Some stuff that should still be done, in no particular order.

* Rounding the entries on some resolution (i.e. 5 minutes)
* Versioning control for invoices
* Split entries that span over a day/a month
* Ability for exporting all data
* Any form of error handling
* Solve the large amount of FIXMEs
* Allow for invoice-time comments for tasks