Removing WithLinkedResource module

As per our ongoing discussion of projecthydra-labs/hydra-works#4

Given that we are soliciting use cases, this may not make the cut.
So instead of cluttering the code, lets kill it and bring it back if
needed.

Attention: @mcritchlow as you are reviewing the existing structure.

Closes #4
Merge pull request #16 from projecthydra-labs/remove-linked-resource

Removing WithLinkedResource module