Optimise images (282 KB reduction)

Hi, Phrogz.

I've taken the liberty of putting context-blender's image assets though a range of optimisation tools. Image optimisation allows us to reduce the footprint of images - meaning faster load times at no cost to image quality. It does this by finding the best (lossless) compression parameters, stripping embedded comments, and removing unnecessary colour profiles. [See more](http://port3000.co.uk/imageoptimiser-a-github-bot-to-proactively-op).

I found 55 optimisable images, making a 282 KB reduction in size. That's about 28.83% of your total image assets.

Merry Christmas.

<table><tr><th>Name</th><th>Reduction</th></tr><tr><td>bg-25.png</td><td>40.88%</td></tr><tr><td>bg-50.png</td><td>40.44%</td></tr><tr><td>bg-75.png</td><td>41.61%</td></tr><tr><td>bg-black.png</td><td>38.52%</td></tr><tr><td>bg-blue.png</td><td>38.97%</td></tr><tr><td>bg-green.png</td><td>39.42%</td></tr><tr><td>bg-grey-check-med.png</td><td>42.86%</td></tr><tr><td>bg-pink-check-med.png</td><td>42.86%</td></tr><tr><td>bg-red.png</td><td>38.97%</td></tr><tr><td>bg-white.png</td><td>41.18%</td></tr><tr><td>multi0_add.png</td><td>84.52%</td></tr><tr><td>multi0_colorburn.png</td><td>5.68%</td></tr><tr><td>multi0_colordodge.png</td><td>82.35%</td></tr><tr><td>multi0_darken.png</td><td>86.33%</td></tr><tr><td>multi0_difference.png</td><td>85.41%</td></tr><tr><td>multi0_exclusion.png</td><td>3.56%</td></tr><tr><td>multi0_hardlight.png</td><td>6.57%</td></tr><tr><td>multi0_lighten.png</td><td>86.77%</td></tr><tr><td>multi0_multiply.png</td><td>87.23%</td></tr><tr><td>multi0_normal.png</td><td>89.67%</td></tr><tr><td>multi0_overlay.png</td><td>86.40%</td></tr><tr><td>multi0_screen.png</td><td>86.42%</td></tr><tr><td>multi0_src-in.png</td><td>61.48%</td></tr><tr><td>multi1_add.png</td><td>8.14%</td></tr><tr><td>multi1_colorburn.png</td><td>7.53%</td></tr><tr><td>multi1_colordodge.png</td><td>7.88%</td></tr><tr><td>multi1_darken.png</td><td>8.14%</td></tr><tr><td>multi1_difference.png</td><td>7.18%</td></tr><tr><td>multi1_exclusion.png</td><td>7.08%</td></tr><tr><td>multi1_hardlight.png</td><td>8.24%</td></tr><tr><td>multi1_lighten.png</td><td>8.16%</td></tr><tr><td>multi1_multiply.png</td><td>7.70%</td></tr><tr><td>multi1_normal.png</td><td>8.40%</td></tr><tr><td>multi1_overlay.png</td><td>8.13%</td></tr><tr><td>multi1_screen.png</td><td>7.62%</td></tr><tr><td>multi1_src-in.png</td><td>12.08%</td></tr><tr><td>multi2_add.png</td><td>8.38%</td></tr><tr><td>multi2_colorburn.png</td><td>7.78%</td></tr><tr><td>multi2_colordodge.png</td><td>8.22%</td></tr><tr><td>multi2_darken.png</td><td>7.20%</td></tr><tr><td>multi2_difference.png</td><td>4.10%</td></tr><tr><td>multi2_exclusion.png</td><td>6.33%</td></tr><tr><td>multi2_hardlight.png</td><td>7.87%</td></tr><tr><td>multi2_lighten.png</td><td>7.67%</td></tr><tr><td>multi2_multiply.png</td><td>6.87%</td></tr><tr><td>multi2_normal.png</td><td>12.60%</td></tr><tr><td>multi2_overlay.png</td><td>7.36%</td></tr><tr><td>multi2_screen.png</td><td>7.64%</td></tr><tr><td>multi2_src-in.png</td><td>12.60%</td></tr><tr><td>over0.png</td><td>49.52%</td></tr><tr><td>over1.png</td><td>12.09%</td></tr><tr><td>over2.png</td><td>12.60%</td></tr><tr><td>under0.png</td><td>39.48%</td></tr><tr><td>under1.png</td><td>28.73%</td></tr><tr><td>under2.png</td><td>33.11%</td></tr></tr></table>

Tools used: advpng, gifsicle, jpegoptim, jpegrescan, jpegtran, optipng, pngcrush, pngout. This is an automated bot maintained by [@skattyadz](https://twitter.com/skattyadz)