Merge pull request #19 from folieadrien/improves-design

Improves design
Merge pull request #20 from folieadrien/renames-groundeditor

renames GroundEditor module to Editor
Merge pull request #21 from folieadrien/refactor

Refactor
Update README.md
Update README.md
Create CONTRIBUTING.md
Update README.md
Merge pull request #22 from folieadrien/refactor

simplify redis model test shared examples
Merge pull request #23 from folieadrien/refactor

upgrades stubs to rspec 3.1 to avoid deprecation warning
Merge pull request #24 from folieadrien/refactor

refactors features with page objects
Merge pull request #25 from folieadrien/refactor

renames some misspelled elements
Merge pull request #26 from folieadrien/refactor

add comment to explain some specificities with capybara
switch negative call to positive call
removes mistake on ground shared url focus scenario