Catalan translation additions and improvements.
Merge pull request #112 from pataquets/master

Catalan translation additions and improvements
library-service* branches have gone (merged into master/ics)
Merge branch 'master' into ice-cream-sandwich
Merge branch 'master' into beta
Merge branch 'beta' into beta-ics
Merge branch 'ice-cream-sandwich' into beta-ics