TODO: Write GUI depicting the Branch-And-Price solve process

[jkinable]

Create a graphical interface showing the Branch-and-Price solve procedure:
-Show the branch-and-price tree as it is being solved. This can be implemented in the same way as the SimpleBAPLogger.java class (the latter class is merely a textual interface showing the same information). It is nice if you can see the branch-and-price tree 'grow'.
-Clicking on a node should give basic information about the node
-Branching decisions should be visible
-The final solution should be exportable to some vectorized image class (e.g. pdf).
-Perhaps a window showing basic information such as best integer solution, lower bound etc