moving some files.... again

- Moved all “_peter_testing_plots” files into  “_matplotlib_plots”
- import_main can now install pip if not currently installed
- adding some notes to submain_obj (as is hasn’t been used in a while)
- starting work on appendToCSV. This will replace the object version
function that appended values to a given CSV, usually provided by the
CPUC. The CSV had all of the information for all the files in a Field
Test