Wildcards in containsHost method

Hi Renyard,
I've updated the util.js file to allow wildcards in the containsHost method. Given validateHosts:

    *.YourTestingServer.net
    *.localhost
    *Test*

the following hosts would all be auto-validated:

    SomeSiteYoureWorkingOn.YourTestingServer.net
    anotherSite.YourTestingServer.net
    workingOnSomethingLocally.localhost
    www.YouShouldTestMe.com
    Testing.net

This could be a temporary fix for #15 perhaps?

Thanks for the extension :)