Allows url to Hudson to have a path.

Hi.

This is the first pull request I've ever made, please tell me if I'm doing something wrong.

Since I was unable to make a request to our hudson server when including the path into the host option, I've separated the path.

That didn't work. I got { [Error: getaddrinfo ENOTFOUND] code: 'ENOTFOUND', errno: 'ENOTFOUND', syscall:
 'getaddrinfo' } no matter what I did :
    jenkinsBuildNumber: {
        dist: {
            options: {
                hostname: 'myserver.domain.local/hudson',
                state: 'lastBuild',
                projectName: 'Meow'
            }
        }
    },

Now that works:
    jenkinsBuildNumber: {
        dist: {
            options: {
                hostname: 'myserver.domain.local',
                path: '/hudson',
                state: 'lastBuild',
                projectName: 'Meow'
            }
        }
    },

Of course, path can be omitted.