Changed ; to , python explits queries by ; was 500 error
Changed parameter action to allow use it from command line
Redefine the Operator role, giving it hability to create sites (but not remove),
edit site name alias and resources, and remove its hability to edit people information;
site executives/admins no longer have the hability to define site name aliases;
site admins cannot edit site pledges anymore.
Redesign of the pledges, fetching federations from REBUS; add description for roles.