[AltStoreCore] Refactors core AltStore logic into AltStoreCore framework

AltStoreCore will contain all shared AltStore code between AltStore and any app extensions. Initially, it includes all AltStore model logic.

Pods/Target Support Files/Roxas-framework/Roxas-framework-prefix.pch

@@ -0,0 +1,36 @@
+#ifdef __OBJC__
+#import <UIKit/UIKit.h>
+#else
+#ifndef FOUNDATION_EXPORT
+#if defined(__cplusplus)
+#define FOUNDATION_EXPORT extern "C"
+#else
+#define FOUNDATION_EXPORT extern
+#endif
+#endif
+#endif
+
+//
+//  Roxas-Prefix.pch
+//  Roxas
+//
+//  Created by Riley Testut on 12/6/14.
+//  Copyright (c) 2014 Riley Testut. All rights reserved.
+//
+
+#ifndef Roxas_Roxas_Prefix_pch
+#define Roxas_Roxas_Prefix_pch
+
+#import <Availability.h>
+
+#ifndef __IPHONE_8_0
+#warning "This project uses features only available in iOS SDK 8.0 and later."
+#endif
+
+#ifdef __OBJC__
+
+#import "RSTDefines.h"
+
+#endif
+
+#endif