pma::makeScoped

Syntactic sugar for creating instances wrapped in a ScopedPtr. @note The default behavior is to rely on the New / Delete pair of lifetime managers, because it's sensible to do so. However, because a significant portion of our abstractions follow the convention of exposing a create / destroy pair of factory functions (where create always returns a raw pointer), there also exists a dedicated FactoryCreate / FactoryDestroy pair of lifetime managers. To change the default behavior in order to utilize a specific lifetime manager pair, specialize the DefaultInstanceCreator and DefaultInstanceDestroyer traits for the types that need different handling. Alternately, it's also possible to pass a custom creator / destroyer on each invocation.