Tree-consolidation cleanup

* make Systems and Processes use base_objects/tree.mustache
* fixup directives/tree.mustache template slightly
* use + <model_name> instead of + Object in some cases
Javascript 'debug' mode to not merge files
Merge remote-tracking branch 'origin/develop' into feature/tree-consolidation

Conflicts:
	src/ggrc/assets/mustache/directives/tree.mustache
Fix title on Section sub-objects list
Merge pull request #235 from reciprocity/feature/tree-consolidation

More fixups for tree consolidation