Update for MSVC14

lexical_cast_loopback_test and cmp_msvc_value_born_error are still expected to fail with MSVC14.
Conflicts:
	status/explicit-failures-markup.xml

status/explicit-failures-markup.xml

@@ -678,6 +678,8 @@
                 <toolset name="msvc-9.0*"/>
                 <toolset name="msvc-10.0*"/>
                 <toolset name="msvc-11.0*"/>
+                <toolset name="msvc-12.0*"/>
+                <toolset name="msvc-14.0*"/>
                 <toolset name="msvc-7.1*"/>
                 <toolset name="vacpp-10.1"/>
                 <toolset name="qcc-4*"/>
@@ -2075,6 +2077,7 @@
 			<toolset name="msvc-10.0*"/>
 			<toolset name="msvc-11.0*"/>
 			<toolset name="msvc-12.0*"/>
+			<toolset name="msvc-14.0*"/>
 			<note author="Joachim Faulhaber">
 				Compiler error expected for msvc: A minimal example of a class template 'value' that
 				results in syntax error in a subsequent meta function.