Squashed 'lib/flot/' content from commit 39bc058

git-subtree-dir: lib/flot
git-subtree-split: 39bc058b211dd9645e3315c4dc93f0b606690544
Merge commit 'a7a60faeb29e7dea253522cd98a1f4864940360c' as 'lib/flot'
Add tooltip and comment component to jquery.flot.comments.js.