fog/fog — pull request #2787 by tokengeek (2014-03-25 17:34:14+00:00)
Title: [Vsphere] Isolate helper from core

`Fog.class_from_string` was moved to core but is only used by the
VSphere provider with very little capacity for reuse.

This moves it to the `Fog::Vsphere` namespace so we can delete it from
core.