Complete rewrite of plot module

Includes multiple new features including:
- New color scheme for readability
- Auto-selling of inactive plots
- Ability to put a plot on a market 
- A plot market where people can see which plots are for sale
- The ability to clear a plot
- Ability for op's to transfer plots at will
- Ability to see number of regions owned
Modifications to seeme's plot module. Too many to list :)