Recruit role

This adds another role to Factions and replaces the officer command.

The new role is designed for new recruits to a faction. It allows factions to recruit more people without risking theft and damages. It greatly encourages factions to allow new members in.

It's been used for a couple of weeks on the server I code for and there are no known issues with it. They all really like it.

It removes the /f officer command, replacing it with /f promote and /f demote. Factions use the /f perm command to change the permissions for the roles.