FLUID-4986: Fixed the issue with non-resolved IoC references in the protoTree. Tests added.
FLUID-4986: Added more tests to support complex nested resolvable references.
Merge branch 'master' into FLUID-4986
FLUID-4986: uiBound IoC expansion to use ${}

A uiBound renderer component must take a ${} for their supplied values.
FLUID-4986: Updated comment in RendererUtilities.js for changed function of fluid.extractContextualPath