Update project with Xcode 5 recommended settings

Author: Blake Watters

Tests/RKValueTransformersTests.xcodeproj/project.pbxproj

@@ -157,7 +157,7 @@
 		25A0133D17DBC1F4006C2BD6 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 0460;
+				LastUpgradeCheck = 0500;
 			};
 			buildConfigurationList = 25A0134017DBC1F4006C2BD6 /* Build configuration list for PBXProject "RKValueTransformersTests" */;
 			compatibilityVersion = "Xcode 3.2";
@@ -306,6 +306,7 @@
 		25A0134117DBC1F4006C2BD6 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				ONLY_ACTIVE_ARCH = YES;
 			};
 			name = Debug;
 		};
@@ -393,7 +394,6 @@
 			baseConfigurationReference = DF2E27B855724C1EA1E411FD /* Pods-osx.xcconfig */;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
-				ARCHS = "$(ARCHS_STANDARD_64_BIT)";
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_OBJC_ARC = YES;
@@ -434,7 +434,6 @@
 			baseConfigurationReference = DF2E27B855724C1EA1E411FD /* Pods-osx.xcconfig */;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
-				ARCHS = "$(ARCHS_STANDARD_64_BIT)";
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_OBJC_ARC = YES;