LDEV-1109: Implement more of the authoring support for tool output based branching. Added the table to store the conditions designed in authoring and refactored the branch mapping table to support the conditions. Modified the authoring code to expect the new objects from the authoring client.
Branching: Tweaking the branch objects so that the contribution flags are right for teacher chosen activities (and hence the button will appear to do the selection in monitoring) and some changes to make the teacher chosen screen logic easier.
LDEV-1257: Added support for Groups to be created in authoring (so that the names can be entered) and the mapping table to map groups to a sequence activity (ala branch) for a Group based branching activity.