#1 Bump Jekyll to 2.4.0 and fix config
#1 Ignore new sass-cache directory
#1 Use underscores in asset paths, spaces are broken in jekyll-assets 0.10.0
#1 Use kramdown per deprecation warning
#1 Use null layout for feed.xml (null is given in new Jekyll 2.4.0 project)
Merge pull request #2 from velocity-labs/upgrade-to-2.4.0

Upgrade Jekyll to 2.4.0