Read port number in command line to debug app on multiple devices

I'm using ios-deploy for continuous integration, so I would like to run the app on multiple devices at the same time. The port used was fixed to 12345, so I think there will be conflicts when running multiple instances of ios-deploy.

One command line options are added:

    -p, --port <number>          port used for device, default: 12345

To find ios device id, go to organizer in Xcode and copy the identifer. Make sure Xcode generated symbols for the devices.

For different devices, assign different ports.

Sample usage:

    ./ios-deploy -i deviceID -b app-path -d -p 12000