README update
README update

- note about installation via Alcatraz
- info about Xcode 6 support

dmnlk/CodePilot,sunzeboy/CodePilot,macoscope/CodePilot,ski081/CodePilot,sunzeboy/CodePilot,ddvip1993/CodePilot,ddvip1993/CodePilot,dmnlk/CodePilot,ski081/CodePilot,macoscope/CodePilot