Blender Git Loki

Fix #1 to resolve corrupted NLA files with lib-linked groups.

- If a library became unreadable, with a print like:
ERROR: can't find lib //../../../../../../..//jorma_light.blend
Then set the F10 "rt" button to 111. :)
That will read files with a stripping routine to fix it.

- For lost actions in strips: press Lkey in NLA editor, this is the new
"re-link action" option. To get it work, dont forget to fill in the
proper Armature in NKey panel.

The real fix, for the code that corrupted relative paths, will be
part of the bf-blender branch merging, which follows.