Use Carthage to manage submodules

Author: jspahrsummers

.gitmodules

@@ -1,3 +1,12 @@
-[submodule "External/ReactiveCocoa"]
-	path = External/ReactiveCocoa
+[submodule "Carthage.checkout/Nimble"]
+	path = Carthage.checkout/Nimble
+	url = https://github.com/Quick/Nimble.git
+[submodule "Carthage.checkout/Quick"]
+	path = Carthage.checkout/Quick
+	url = https://github.com/Quick/Quick.git
+[submodule "Carthage.checkout/xcconfigs"]
+	path = Carthage.checkout/xcconfigs
+	url = https://github.com/jspahrsummers/xcconfigs.git
+[submodule "Carthage.checkout/ReactiveCocoa"]
+	path = Carthage.checkout/ReactiveCocoa
 	url = https://github.com/ReactiveCocoa/ReactiveCocoa.git

Cartfile

@@ -0,0 +1,4 @@
+github "ReactiveCocoa/ReactiveCocoa" ~> 2.4.1
+github "jspahrsummers/xcconfigs" >= 0.6
+github "Quick/Quick" == 0.2.0
+github "Quick/Nimble"

Cartfile.lock

@@ -0,0 +1,4 @@
+github "Quick/Nimble" "v0.1.0"
+github "Quick/Quick" "v0.2.0"
+github "jspahrsummers/xcconfigs" "carthage-0.6"
+github "ReactiveCocoa/ReactiveCocoa" "v2.4.1"

Carthage.checkout/Nimble

@@ -102,8 +102,8 @@
 		D0948B591781618A00BA8F23 /* RVMViewModelSpec.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RVMViewModelSpec.m; sourceTree = "<group>"; };
 		D0948B5C178161A800BA8F23 /* RVMTestViewModel.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RVMTestViewModel.h; sourceTree = "<group>"; };
 		D0948B5D178161A800BA8F23 /* RVMTestViewModel.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RVMTestViewModel.m; sourceTree = "<group>"; };
-		D0C7C39E19FEF8F60069B5C0 /* Framework.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = Framework.xcconfig; path = External/ReactiveCocoa/External/xcconfigs/Base/Targets/Framework.xcconfig; sourceTree = SOURCE_ROOT; };
-		D0C7C39F19FEF8FC0069B5C0 /* iOS-Framework.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = "iOS-Framework.xcconfig"; path = "External/ReactiveCocoa/External/xcconfigs/iOS/iOS-Framework.xcconfig"; sourceTree = SOURCE_ROOT; };
+		D0C7C39E19FEF8F60069B5C0 /* Framework.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = Framework.xcconfig; path = Carthage.checkout/xcconfigs/Base/Targets/Framework.xcconfig; sourceTree = SOURCE_ROOT; };
+		D0C7C39F19FEF8FC0069B5C0 /* iOS-Framework.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = "iOS-Framework.xcconfig"; path = "Carthage.checkout/xcconfigs/iOS/iOS-Framework.xcconfig"; sourceTree = SOURCE_ROOT; };
 		D0C7C3A719FEFB520069B5C0 /* ReactiveViewModel.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = ReactiveViewModel.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		D0C7C3B119FEFB520069B5C0 /* ReactiveViewModel iOS Tests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = "ReactiveViewModel iOS Tests.xctest"; sourceTree = BUILT_PRODUCTS_DIR; };
 		D0C7C3C719FEFC7D0069B5C0 /* ReactiveCocoa.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; path = ReactiveCocoa.framework; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -237,7 +237,7 @@
 				D0948A88178159DA00BA8F23 /* README.md */,
 			);
 			name = Configuration;
-			path = External/ReactiveCocoa/external/xcconfigs;
+			path = Carthage.checkout/xcconfigs;
 			sourceTree = "<group>";
 		};
 		D0948A74178159DA00BA8F23 /* Base */ = {