Removed assets folder (moved to subtree repo).
Squashed 'assets/' content from commit 2a3c4cd

git-subtree-dir: assets
git-subtree-split: 2a3c4cd1be2a592f0a1ec57a0620952bde6b8abc
Merge commit '669ca1c3ff3470052b831e0db3c71d3e758ba8d2' as 'assets'