Picasa 2 credentials are now also saved as loot

This module used to save only Picasa 3 credentials as loot. Picasa
2 creds were displayed, but not saved. I've updated the module to
save Picasa 2 credentials, and I also updated the output code to
use print_good instead of print_status.
Merge branch 'picasa' of github.com:charles-n2netsec/metasploit-framework into charles-n2netsec-picasa
Msftidy cleanup + handling return values better