Updating skeletal animation sample to account for asset_pack's removal of PropertyMapImporter
Merge pull request #59 from donny-dont/compressed-textures

Updating skeletal animation sample
Fix importers

Signed-off-by: John McCutchan <john@johnmccutchan.com>
Update to latest asset_pack.

Signed-off-by: John McCutchan <john@johnmccutchan.com>