Update translations and version
Implement GET API
Adds resource to hypermedia. fixes bugs with permissions and incorrect URLs
update .ini for version and omeka minimum version
make version 2.1-rc
Fix broken item search.

The items controller doesn't listen to POSTs, only GETs for parameters.
Fix permissions problems with API.
update version
leave minimum omeka version at 2.1-dev instead of 2.1 from last commit
update .ini
Merge branch 'master' into next

Conflicts:
	functions.php
	models/Table/ExhibitPage.php
	plugin.ini
	views/admin/javascripts/exhibits.js