update pi_list for M-Lab in sites.py
add try/excepts for ADMIN operations
add .gitignore
simplify error printing
back off NodeGroup change to nuq0t
exit on PLCAuthenticationFailure Faults
add Joshes back
remove space
Merge pull request #6 from stephen-soltesz/master

update M-Lab operator list, and handle failures due role mismatch a little better