L2 Monitoring and Pedestal Documentation

This documentation inludes a few things:

- A detailed guide to L2 monitoring (starting the code)
- A detailed guide to monitoring and updating the L2 pedestals
- A detailed guide to updating the L2 tower masking file
- A few comments about the L2 algos and how they work together

This is the most up to date version of the documentation, but hasn't had vital changes since the 2014 copy.