[#368] Ported revision history page to new template system
[#408] Remove organizations (publisher) code
[#368] Refactor truncate in revisions table
[#368] Revisions table should not be condensed which would otherwise lead to display errors with in radio buttons
[#368] New templates for revisions
[#368] New template for revision diff
[#368] New template for revision read
[#368] New template for revision list
[#368] New template for group history
Merge remote-tracking branch 'okfn/master' into 368-new-history-page
[#368] Fix display of action buttons for revisions which broke after I merged in the latest master with new bootstrap.
[#368] Add `num_followers` after validating the group_dict against a schema.
This makes sure that is still there and is necessary because we require a schema in controllers.group.history but there is no `num_followers` field in logic.schema.default_group_schema.
[#368] Add `num_followers` to group schema
[#471] Deprecate lib.helper link functions
[#471] Fix template for nav_named_link() removal
[#471] Fix template for subnav_link() removal
[#471] Use suggested function not direct link for clarity
[#471] Fix up nav_named_link() so now uses nav_link()
[#471] Fix subnav_named_route() to use nav_link()
[#471] Fix nav_link() when controller supplied as positional arg