Fixed more warnings and applied workaround for getting to std::numeric_limits without clashing with Windows' min() and max() macros.

Test/MessageTests.cpp

@@ -48,4 +48,4 @@ TEST_CASE( "./mixed/message/info/2", "INFO gets logged on failure" )
 TEST_CASE( "./failing/message/fail", "FAIL aborts the test" )
 {
     FAIL( "This is a " << "failure" );    // This should output the message and abort
-}
+}