update format script, create summary script

The format script cleans data and adds columns. The summaries script
takes the formatted data and creates useful subsets and summaries. Only
current summary is annual max clad height at each survey point.
updated summaries cript

merge data on flow, depth, and light into dataset on annual max clad
height. Still need to work on how to deal with substrate.
update format script

fix depth record that is far larger than it should be.