Refactored ConsoleColour impl. Tweaked the (Windows) colours a bit.

Also fixed issue that would cause warnings on some compilers when doing REQUIRE( p ); where p is a pointer.
Moved to build 23

include/internal/catch_version.hpp

@@ -13,7 +13,7 @@
 namespace Catch {
 
     // These numbers are maintained by a script
-    Version libraryVersion( 0, 9, 22, "integration" );
+    Version libraryVersion( 0, 9, 23, "integration" );
 }
 
 #endif // TWOBLUECUBES_CATCH_VERSION_HPP_INCLUDED