whitespace
listen integration
almost finished listen integration just need some real world testing
Update columns support
Update filter support
Update user-select support
Update gems, implement Foreman
Fix README and make it more user-friendly

- Reorder the README segments
- Provide a better TOC
- Put the project structure in a nice table
- Provide more links & fix existing ones
- Introduce a different workflow, watch + view
- Remove Serve
- Remove the binstubs practice
Remove Serve
Fix TOC linking
Merge branch 'listen'
Lock nanoc version
Small clarification in the docs
Remove Rakefile
rake task for running integration tests only
sprite_path now uses the correct file path for generated sprites closes #1077
added sass fuctions for sprite_width and sprite_height closes #1076
added verification to sprite functions
updated documentation for sprite functions
forgot to add link in docs