refactor activities and contributings views
add dashboard controller and view
fix modal zindex issue
add jquery.sticky-kit
fix sticky columns behavior
start new frontpage
improve frontpage
create 'use cases' sprite
add 'resize-sprite' mixin
update partners logos
add 'partners' section to frontpage + improvements
add 'pseudo' admin role + map/geo_data is_featured
Merge branch 'master' into dashboard

Conflicts:
	app/assets/stylesheets/application.css.scss
	db/schema.rb
frontpage i18n
remove `resize-sprite` mixin
update some specs
make compatible with future `admin` implementation
refactor `featured` content implementation
specs
more specs