resolves #70 add copy to clipboard button to source blocks
- add subsetted SVG icon sprite for octicons
- add copy to clipboard button to source blocks (visible on hover)
- replace pseudo-element for source language with a toolbox (managed by JavaScript)
- autodetect literal block with command and promote to a console source block
- intelligently extract commands from console source block, flatten them, and join them in a chain
- prevent command prompt(s) in console source block from being selected
- darken color for annotation on source block
- configure svgo to preserve desc element
- configure svgo to preserve ID prefixes for icons
Edited by Dan Allen