New features

Added the ability to set Principal Investigators on projects. PIs are able to see all activities for the projects they manage in the "My usage" page.
Added exporting of data in CSV format from "My usage" page.
When forcing a user out of a tool, if there are any required unanswered post usage questions, the required questions will be sent in an email to the user, lab managers, tool owner & backup owner, and to the staff member who forced the user off. Blank answers are set in the usage history record until edited in detailed admin.
Added float post usage question (with optional precision property) and textarea (with optional rows property)
Added tool documents. (thanks to 4D Labs for the contribution)

Improvements

Added options for last 10, 25, 50 & 100 records and filtering by users in tool usage data history
Added filtering by tool in Tool usage counter admin page
Improved the import of plugin URLs to be more consistent

Fixed an issue where areas that don't require a reservation would not show up when using staff charges
Updated to latest versions for all dependencies