Testing GetImmediateSubtypes, fairly lightly so far.
Fixed msg for test_GetImmediateSubtypesWrong.
Enabling jinja2 templates for full listings page generation.
Enabled jinja2 templates. Partial full.html impl but will move it to a branch.
Directory for jinja2 templates, and first cut at full hierarchy template.
removed premature full hiearchy implementation.