Remove string, integer, and int type hints.
Merge pull request #2938 from digitalaun/1.3.x

Remove string, integer, and int type hints;

We tried this in efforts to clean up our interfaces, but alas in a shared programming environment, there is just no way to get error handlers in place early enough to do this effectively in a plugin.
Updated category description test for issue #2931 changes
Fixed #2960 Corrected subqueries for proper record aggregation
Fixed #2956 Added HTML content-type header for clients to render  entities properly
#2806 Moved session storage to WP options with timeout and garbage collection support