EC ODP Theme updates

[johnglover]

Changes:

• tidy up activity feed on home page or replace with search results (by modified date)
• move ckan menu to a left sidebar (see Sam's template) (not doing this now)
• update templates with changes from master
• use local image in language dropdown (ecportal.js)
• update dataset read template

To discuss:

• should we rename 'organization' to 'publisher'? Requires updating all templates and the url mapping.

[johnglover]

Will create a separate ticket for 'organization' to 'publisher' renaming, the rest are done.