BugFix #546 execute_hook return value
Added a saner test-description, since hooks may influence content, but not by return value
Reflect changes
Merge branch 'corecache-pr/546_execute_hook_return_value'
Fix: Additional HTTP methods for Ajax plugin #543
Merge pull request #561 from corecache/pr/543_allow_http_methods_ajax

Add additional HTTP methods for Ajax plugin (GH #543).
Minor cleanup of comments and POD in Ajax plugin.