tst object directory

TST Object Directory

All user work in tst takes place within tst object directories -- objects in tst can be: assignments, activities, groups and events. A tst object directory is simply a directory that tst recognizes as being one of these.

In the current implementation, a tst object directory is recognized by a single file: tst.json. In future implementations, however, we plan to use a hidden .tst directory to accomplish this goal (see issue #12).