Xcode 4.6 project upgrade

Author: rowanj

GitX.xcodeproj/project.pbxproj

@@ -1279,7 +1279,7 @@
 		29B97313FDCFA39411CA2CEA /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 0420;
+				LastUpgradeCheck = 0460;
 			};
 			buildConfigurationList = 26FC0A880875C7B200E6366F /* Build configuration list for PBXProject "GitX" */;
 			compatibilityVersion = "Xcode 3.2";
@@ -1771,6 +1771,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				CLANG_ENABLE_OBJC_ARC = YES;
+				COMBINE_HIDPI_IMAGES = YES;
 				FRAMEWORK_SEARCH_PATHS = "\"$(PROJECT_DIR)\"";
 				GCC_DYNAMIC_NO_PIC = NO;
 				GCC_ENABLE_OBJC_EXCEPTIONS = YES;
@@ -1790,6 +1791,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				CLANG_ENABLE_OBJC_ARC = YES;
+				COMBINE_HIDPI_IMAGES = YES;
 				FRAMEWORK_SEARCH_PATHS = "\"$(PROJECT_DIR)\"";
 				GCC_ENABLE_OBJC_EXCEPTIONS = YES;
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;