Added a roadmap description and an image depicting the user interface

|DOCUMENTATION|
[Roadmap]
* A few basic concerns are raised and the initial vector for the roadmap is set
[User Interface/Mockup]
* An initial stab at the layout for the tool, the content renderer section is
  intended to be interchangeable to show the dependency graph
Expanded on the mock UI

|DOCUMENTATION|
[User Interface/Mockup]
* Added a text file briefly detailing the mechanics of the UI elements