Add tomorrow theme
Squashed 'bundle/vim-tomorrow-theme/' content from commit 010d249

git-subtree-dir: bundle/vim-tomorrow-theme
git-subtree-split: 010d2492ba8f2eea59191fe0f3c33a1dc6ce93a7
Merge commit '6c3611aec104c6b44d620354fb7e0414b3340920' as 'bundle/vim-tomorrow-theme'