#47 Object - smart pointer improvement and VariantData class

[Marcello Pietrobon]

Fraggle was pointing out in the forum the need of
having the VariantData class to better manage the
Object* data.

This could be done after some improvements on the smart
pointer class of the Object class.

Forum:
VariantData pointer members, Handled correctly?
http://vcf-online.org/forums/index.php?showtopic=504&pid=4203&st=0&#entry4203