add clearance stuff on server side

it stills require modification to make sharing email proper
fix stlyes after bootstrap version changed
add helpers for clearance and server side localization
update model for clearance and add missing cozy instance model (for domain)
add mail templates
change controllers to handle clearances properly
add clearance lib and update bootstrap
update client build dependencies
add new icons for glyphicon
client: add modal helper
clearance styles
update album view to handle clearance
improve button flow in the album view
update locales
add missing methods required by the clearance modal to model
client build
add middleware to handle clearance rights on routes properly
fix client-side using clearances & remove contacts ref
move all clearance handling to sharing controller
let clearance do its job, remove old contacts route