cleanses html markup
refactors markup and adds a sidemenu visible on mobiles
format features spec with capybara's syntax
add tests for mobile sidemenu
refactors some tests
dry up ground specs with shared examples
refactors javascript
footer redesign
Merge pull request #19 from folieadrien/improves-design

Improves design
renames GroundEditor module to Editor
Merge pull request #20 from folieadrien/renames-groundeditor

renames GroundEditor module to Editor
refactors gui
refactors code samples
Merge pull request #21 from folieadrien/refactor

Refactor
Update README.md
Update README.md
Create CONTRIBUTING.md
Update README.md