[refactoring] Started to move (un)wrapper informations to another classes. Added a new RunnableManager class, which handles Runnables in CodeSharper.
CodeSharper.Core/Common/Runnables/RunnableDescriptor:
  - Added a descriptor class to Runnable
  - Handles Consumes and Produces attributes automagically ;)
CodeSharper.Core/Common/Runnables/ProducesAttribute and ConsumesAttribute:
  - Added two semantic argument (un)wrapper attributes
  - These are evaluated by RunnableDescriptor class