Fix failing spec
Change HTML to play well with bootstrap 3 grid system
Make ProjectsPresenter render using a HTML table instead of list
Add styling
Use purpose helper with tops on homepage
Styling
Remove link 'Users' from top menu
Revert hiding taggings when empty (makes spec fail)
Add feature spec for editing a membership description
Add missing validations in membership_spec
Add field 'description' to memberships
Add coverage for project description field in project_presenter_spec
Implement UpdatingAPerson and use it in people_controller
Implement UpdatingAProject and use it in projects_controller
Implement UpdatingAMembership and use in memberships controller + views