OS X target support.
OS X target support - include i386 and x86_64 archs.
AlamofireOSX.framework product added.
Alamofire.framework for both iOS and OSX.
Inherit code sign from project.
iOS / OS X Default Signing Identities
Merge branch 'master' of https://github.com/AdaptiveMe/Alamofire into AdaptiveMe-master

Conflicts:
	Tests/DownloadTests.swift
Merge branch 'AdaptiveMe-master'