Set arch to x86_64 only, minimum deployment target to OS X 10.7
Fix compiler warning

NSUInteger is unsigned long on 64-bit
On 64-bit only there's no need to cast to long types
Automatic property synthesize
Update OS version in pjsip library names
Add missing #import
Remove commented code
Convert sources to support ARC
Use weak references for IBOutlets
Nullify view controllers

Incoming Call View Controller, Active Call View Controller, and Ended
Call View Controller have bindings in the UI to Call Controller's
properties. When Call Controller is allocated on call window close,
those view controller's still doing their KVO and an error is
issued. By this nullifying we release view controllers before Call
Controller is released.
Set code signing identity to Mac Developer
Re-implement singleton using GCD
Use new HAL API

Fixes #11
Declare method in super and call it directly

Under ARC and in Debug mode there was a BAD_ACCESS crash with the old
way of calling implementation in super.
Update Readme
Update Readme
Keep up with upstream changes to make a seamless pull request.

Merge remote-tracking branch 'upstream/master' into calllog

Conflicts:
	Classes/AppController.h
	Classes/AppController.m
	Classes/CallController.h
	Classes/CallController.m