i18n. Update messages.pot
Locale. es_ES
Locale. ca_ES
i18n. es
i18n. ca
i18n. ca_ES
i18n. es_ES
Merge branch 'develop' of github.com:zikzakmedia/trytond-nereid into issue-15
Merge pull request #16 from openlabs/issue-15

Manual merge of the PR since it wasnt rebased with the updated travis file