starting rmg modifications

Hooks in rmg script for monitoring/controlling the field computers.
renamed sitelist script to rmg_csv
rmg_csv: get cols per row

Print a specified list of parameters per site.
rmg: get_sitelist() defunct
rmg status() next: get sites' status
rmg_csv --last-row (new feature)

Row operations on last row. This is usefulf or status logs.
rmg status() finished
rmg update()
rmg up/down/start/stop