[#1251] Update IResourceView interface.

Use 'view' instead of 'preview' and update docstrings.
Update code that uses IResourceView plugins
accordingly.
[#1251] Update ckanext.imageview to work with new
IResourceView changes.

Use 'view' instead of 'preview'.

Move 'form_template' to top level method.

If no image_url specified, try to view the resource url.
[#1251] Fix failing tests.
[#1251] Bug fix: resource_view_list returns [] if
no views, not NotFound
[#1251] fix preview
Merge remote-tracking branch 'origin/1251-resource-view' into 1251-resource-view
[#1251] view proxy sort out
[#1251] Add basic imageview test
[#1251] Add iframe to resource view snippet.

Allow view plugins to disable iframing by setting
'iframed': False in their info dicts.

Actual iframe URL not included yet.
fix merge issue in branch
[#1251] Add resource_view controller
Merge remote-tracking branch 'origin/1251-resource-view' into 1251-resource-view
[#1251] Set iframe src URL in resource_view snippet.

Update textpreview plugin.
[#1251] fix preview on new and proxy textpreview plugin
[#1251] fix pdf view
[#1251] Updating Recline views for new IResourceView
interface.

The only view options that are currently supported
are row offset and limit (so the graph in
particular is not usable at the moment).
[#1251] Disable JS popover call.

Throws an error which is currently preventing
Recline views from loading.
[#1251] Fix embed link for non iframe views
[#1251] webpage view type
Merge branch '1251-resource-view' of github.com:okfn/ckan into 1251-resource-view