Added custom configuration options feature
Added change from #740 into new config options
Added missing comments and some safeguards
Fixed test regarding explicit runtimepolicy for contenttypepolicyconfigurator
Added backward compatibility for IConfigurable instances using the section.RuntimePolicies
Moved instantiation of runtimepolicies to the top
Finalized rebase on version-2
IConfigurableExtended became IConfigurable - no more backward compatibility