change commands to sudo. change supervisor to restart

[krystofbe]

Hi @jakeheis,

tried Flock today. Such a great tool.
I ran into some problems trying to use flock tools

SupervisordTasks.swift:

• For security reasons, i think it's better to use sudo for running apt-get and service commands. A well secured sudo setup will ensure that a given user can only execute certain commands.
• On my Ubuntu 14.04 Box, supervisor already gets started after the installation. So trying to start it again with service supervisor start returns 1 and the whole process errors.
• double %% static var errorLog = "/var/log/supervisor/%%(program_name)s-%%(process_num)s.err"
  give me this error error: <class 'xmlrpclib.ProtocolError'>, <ProtocolError for 127.0.0.1/RPC2: 500 Internal Server Error>: file: /usr/lib/python2.7/dist-packages/supervisor/xmlrpc.py line: 470 Channging to single % fixes this for me

Best wishes from Germany!

[jakeheis]

Thanks for your contribution! I'm going to hold off on merging this until we decide what to do with #5 since the two are tightly related

[jakeheis]

eb24630 incorporates some of these changes while keeping sudo out of calls made during deploy (#5). Thanks again for your contribution!