Blender Git Loki

Append/link from 'global' level works.

Note I had to implement 'relative' path handling for 'filenames' in
append/link op, we may want to do this a bit differently later?

Fix name issue (stupid really), show them better in UI.

Do not shoz/consider at all inner '..'

Also more debug code that'll need to be cleaned up

First (awful) tests to get a whole blend file content shown flat

Main goal is to see whether we can use existing filelist to handle that
(by default it is 100% tree-oriented).

Also, getting some strange issues with ID name currently...