Allow full RACI relationships edited and viewable within workflow models or in Association grids

[#1]

Allow full RACI relationships within models and within Association grids. 
Currently consider the
R - Responsible for is the perfomer of the activity within its swimlane
A - Accountable for - is the Owner of a workflow - as indicated by the relationship between the Activity that is the subject of the model and the Owner of that model (at a higher level)
C - Contributes to - currently we have a customized associations for this but would be good to have a common way to do this (a built in association)
I - Informed about - currently we have a customized associations for this but would be good to have a common way to do this (a built in association)
Should be able to edit these either within a model or to view the RACI in an Association matrix - and edit in both places and if it is edited in one place it should appear in the other.
As a side note the CRUD relationships should be like that too - when you create the C, R, U or D it should create the appropriate association relationship, not just give you a visual representation in a model. Should be able to create the CRU or D relationships either in a matrix or when you are in a model and them to change the database so it can be seen and edited in both locations.