7.0 monitoring

port MP from https://code.launchpad.net/~camptocamp/server-env-tools/7.0-monitoring/+merge/215138 as requested as part of #35 
Hi, 
I have some bad log, installing your module.

    Ambiguous import: the OpenERP module `resource` is shadowed by another
    module (available at /usr/lib/python2.7/lib-dynload/resource.so).
    To import it, use `import openerp.addons.<module>.`.