Add Is It Open links to package pages

[rgrp]

On each package page in the openness field if the package is not open provide a link to is it open create enquiry page.

Details:

• may want to add to the url a query parameter indicating which package this relates to e.g. ?ckan-package=...
• ​http://isitopen.ckan.net/enquiry/create/?ckan-package=...
• do we provide link even if package is open (e.g. so that people can make enquiries about e.g. adding open data/content buttons ...)

Cost: 0.5h

[dread]

Done in 0.5h Checked in to dd2f9713a6a2. Third detail done - enquiry can be done for all packages. Still need to change isitopen site to make use of the parameter ?ckan-package=<package_name>