dataset view: hide portal release date
dataset form: big_checkbox_field for ready_to_publish
navl schema: use json true/false for ready_to_publish
dataset view: render ready_to_publish as friendly check or X
update boolean field type documentation
Merge pull request #140 from wardi/master

dataset view and form: ready_to_publish and portal_release_date tweaks
Merge branch 'master' of git://github.com/open-data/ckanext-canada