Add Utils::transform and anyOf that take a member function pointer.
Remove bestElementOr it's unused.

Use declval<T> in transform's return type, because msvc does evaluate
T() and for types that don't have simple constructor this fails.
Add std::remove_reference since decltype returns a reference for
lvalues.

Change-Id: I22248b226748eeb27af0d300182d574438d7f756
Reviewed-by: Eike Ziller <eike.ziller@digia.com>