Add printing adjustments

Depended on by ocf/utils#114

Allows staff members to adjust users' paper quotas in a more flexible manner.

We add the following functionality to the paper script: forward: increases a user's daily quota for the day only

This is intended to be used to give users some degree of freedom when printing documents.

For example, if the daily print limit was set at 10 pages and a user wanted to print 12 pages, this would not be possible with the current way things are configured. forward provides the way to increase the daily print limit without increasing the amount of pages a user can print in a semester.

The associated quota tests need to be updated as well before merging this in