Added unique_ptr detection to compiler_capabilities

- as well as use by C++11 conformant compilers now enabled for VS2013 on too (see #479)
- updated docs with this (and long long and override support)

docs/configuration.md

@@ -58,6 +58,9 @@ This can be useful on certain platforms that do not provide ```std::cout``` and
 	CATCH_CONFIG_CPP11_IS_ENUM				// std::is_enum is supported?
 	CATCH_CONFIG_CPP11_TUPLE				// std::tuple is supported
 	CATCH_CONFIG_VARIADIC_MACROS 			// Usually pre-C++11 compiler extensions are sufficient
+	CATCH_CONFIG_CPP11_LONG_LONG			// generates overloads for the long long type
+	CATCH_CONFIG_CPP11_OVERRIDE				// CATCH_OVERRIDE expands to override (for virtual function implementations)
+	CATCH_CONFIG_CPP11_UNIQUE_PTR			// Use std::unique_ptr instead of std::auto_ptr
 
 Catch has some basic compiler detection that will attempt to select the appropriate mix of these macros. However being incomplete - and often without access to the respective compilers - this detection tends to be conservative.
 So overriding control is given to the user. If a compiler supports a feature (and Catch does not already detect it) then one or more of these may be defined to enable it (or suppress it, in some cases). If you do do this please raise an issue, specifying your compiler version (ideally with an idea of how to detect it) and stating that it has such support.