Fixed active/cached-doc comparison to actually compare the documents. Fixed a bug where the dialog would try to update when cinema was first booting and couldn't find any living active documents.
Merge branch 'master' of https://github.com/donovankeith/py-cinema4dsdk

Conflicts:
	gui/todo-list.pyp
Added iter-all.pyp - a command plugin which demonstrates iteration of: objects, tags, materials, and layers of the active document.

Updated iter-hierarchy.pyp to correct for some typos and references to C++ SDK files.
Merge https://github.com/donovankeith/py-cinema4dsdk