Crush png images

```
find . -type f -name *.png | xargs /usr/local/bin/optipng -o6 -strip all
find . -type f -name *.png | xargs /usr/local/bin/advdef -z -4 -i 5
```

9.3M -> 8.3M
Crush jpgs

```
find . -type f -name *.jpg | xargs -I {} /usr/local/bin/jpegtran -copy none -optimize -perfect -outfile {} {}
```

~20K improvement
Drop un-used edge_template.rb
Move google analytics code to the bottom of HTML
Collapse highlight SCSS into site
Move scripts to foot of HTML, defer about apps
Update middleman
Add several widths and heights to images
Merge pull request #1337 from mixonic/speedy

Speedy site