fix album creation

* photo can be uploaded
* ui doesn't change when title is edited
* cover picture is automatically set
fix upload zone: it fills the whole height now
Merge pull request #53 from frankrousseau/master

fix album creation
change loading picture
improve deletion ux
fix raw image download
Fixed: the photo counter was not updated when a photo was added or removed in an album. Close #55
Added: reference to imagemagick as a dependency in the readme. Close #54
Merge pull request #56 from jsilvestre/master

Various fixes
Merge branch 'master' of github.com:cozy/cozy-photos

Conflicts:
	client/public/javascripts/app.js.map
Merge pull request #57 from frankrousseau/master

Improve deletion UX + change Loading picture
add missing attribute 'n' to contact model
Merge branch 'master' of github.com:cozy/cozy-photos
fix clearance styles
change error image
add default picture to clearance modal
display download button again in sharing mode
add purl library
fix public download url
remove debug alerts