added caching port used from cmd

Ignore-this: 8cc1576bf8af0fe5b7efd8bcdf6a7ccd

So that you can set port first time you run instead of every time. Eventually a GUI will allow you to change it.

darcs-hash:20131231045032-c21fe-3915351a69b850a2edd560591a1e83248ce48697