Add build target to open in terminal window

To help folks who are not used to tracking down the derived data folder
in Xcode's silly application data folder.
Merge branch 'master' of github.com:RadiusNetworks/ibeacon-cli

* 'master' of github.com:RadiusNetworks/ibeacon-cli:
  updated readme for usage of uuid flag
  fixed typo in options usage for setting broadcasting UUID