Auto-assigning projectleader/manager to projects. Including message
pep8
Showing form errors (when applicable)
Team update page is only needed for internal projects. Fixed.
Internal hours aren't 'danger' colored anymore. The 'default' blue suffices.
Added hint that the 'left to book' number excludes the current week
Reverse-sorting invoice number too, instead of only the invoice date
Adding messages
Invoices edited go back to the invoice overview page when clicked there
More info on invoice edit page
Updated changelog