Add HTML/RSS meta data when viewing a authority term

See: GigaOM/gigaom#1841
Adding some capabilities checks to the AJAX functions.
embrace all the things
Merge pull request #30 from methnen/ajax_capability_checks

Adding some capabilities checks to the AJAX functions.
Check if the post_excerpt is not empty rather than if the contents evaluates to TRUE
Merge pull request #29 from borkweb/1841-meta-data

Add HTML/RSS meta data when viewing a authority term
Enforcing authority on the most recently updated posts first
Code standards improvements, removed unreported call to _update_term_counts() during term_suffix_cleaner_ajax(), added ajax handler to call _update_term_counts() directly.
Added link in tools template to reset/update term counts
Added a stemming method (thanks to 3rd party code) and added the stems to the term report; also refactored how the admin and tools objects are loaded and accessed.
removing unintentional addition
Created a real stem report CSV and removed stems from the other reports.
Added term spell checking report using Bing/Azure APIs
fixed a stray bit of dev code
Added a sleep delay to work around what appears to be undocumented rate limiting, though this needs more testing before it can be confirmed.
improved stem report
Blocking authority records from appearing in the waterfall (I think), maybe fixes https://github.com/GigaOM/legacy-pro/issues/585
Small fix for WP 3.6
Fix for authority enforcement when using inside of GO xPost plugin.
- Also has the added benefit of enforcing the authority records on update of object terms instead of on post save which makes more sense anyway.
Syncing with master before making changes.