work on hooking up data invisibility toggle by using ckan's extras field
for packages
Merge branch 'develop' of
https://github.com/SenseTecnic/ckanext-wotkit.git into
feature-dataset-invisibility

Conflicts:
	ckanext/wotkit/plugin.py
some more work with the invisibility feature
more fixes to check for invisibility and creator support
added auth extension for dataset invisible field so it works with API calls
more work to catch edge cases for the invisibility field and made search backwards compatible with old data
fixed a bug that caused 500 error with search filtering
fixed another dataset search bug that caused nothing to be returned when
search query is blank
added authentication checks so that only the package creator can edit a
package
added fix for organization visibility bug
added extension to change user name validator length from 2 to 4 to be
compatible with wotkit
fixed some import bugs with the last username length fix
fixed identation bug
more minor bug fixes
same fix again
fixed bug with dataset visibility feature where user provided extra
fields would cause the pkg_creator field to be set to deleted
fixed a bug where create package schema calling functions that were
removed
fixed a bug where adding a dataset from groups page will throw a 404
error