Update is_assignable to be well-defined on MSVC 2013+ (#62)

* Adding test case for is_Assignable of non-primitive value to ref

* Add support to let MSVC 2013+ pass new test case

* Moved is_assignable test to appropriate location

Prevents fail on vs2012-

include/EASTL/internal/type_pod.h

@@ -1294,7 +1294,7 @@ namespace eastl
 	//
 	///////////////////////////////////////////////////////////////////////
 
-	#if (defined(EA_COMPILER_NO_DECLTYPE) && !EASTL_TYPE_TRAIT_declval_CONFORMANCE) || defined(_MSC_VER) // VS2012 mis-compiles the conforming code below and so must be placed here.
+	#if (defined(EA_COMPILER_NO_DECLTYPE) && !EASTL_TYPE_TRAIT_declval_CONFORMANCE) || (defined(_MSC_VER) && _MSC_VER <= 1800) // VS2012 mis-compiles the conforming code below and so must be placed here.
 		#define EASTL_TYPE_TRAIT_is_assignable_CONFORMANCE 0
 
 		// It's impossible to do this correctly without declval or some other compiler help.
@@ -1667,7 +1667,7 @@ namespace eastl
 	// For a complete type T and given 
 	//     template <class U>
 	//     struct test { U u; };
-	// test<T>::˜test() is not deleted (C++11 "= delete").
+	// test<T>::˜test() is not deleted (C++11 "= delete").
 	// T shall be a complete type, (possibly cv-qualified) void, or an array of unknown bound.
 	//
 	///////////////////////////////////////////////////////////////////////

test/source/TestTypeTraits.cpp

@@ -1020,6 +1020,7 @@ int TestTypeTraits()
 		// These might not succeed unless the implementation is conforming.
 		static_assert((eastl::is_assignable<Assignable, Assignable>::value == true),  "is_assignable failure");
 		static_assert((eastl::is_assignable<Assignable, Pod1>::value       == true),  "is_assignable failure");
+		static_assert((eastl::is_assignable<PodA&, PodA>::value            == true),  "is_assignable failure");
 
 		// These cannot succeed unless the implementation is conforming.
 		static_assert((eastl::is_assignable<void, void>::value             == false),  "is_assignable failure");