LDEV-1134: Fixed the View Branches screen for tool output based branching - I can't list the users based on groups as they aren't in groups (and I can't put them in groups as the groups have to be linked to the condition and if the user goes to the default branch there is no condition). So for tool output based branching I have to find the users via their progress records.
LDEV-1109: Fixing bugs in the authoring support for tool output based branching and getting the progress engine working. A rough implementation of the condition checking down for one MCQ condition for demonstration purposes. Two new methods added to the tool contract.