Update D3.js to 3.4.0
Update Flot charts to 0.8.2
Update less.js to 1.6.1
Merge pull request #2478 from eryx/lessjs

Update less.js to 1.6.1
Merge pull request #2476 from eryx/work-d3

Update D3.js to 3.4.0
Merge pull request #2477 from eryx/work-flot

Update Flot charts to 0.8.2