* checkForUpdates() now returns the update or null.
* Added a new getUpdate() method. Use it to retrieve update details (if there is an update available). It uses the internal cache, so use checkForUpdates() instead if you want the most recent info. Also, if no update is available, or if its older than the installed version, it will return null.
* Changed our plugins_api filter priority to 20 to fix a compatibility problem caused by a bug in the WooThemes plugin updater. In short, the WooThemes updater also has a plugins_api filter, and their implementation will throw away the response returned by other filters.
* The default wp_remote_get() options are now correctly filtered, not completely discarded.
* Fixed a bunch of IDE warnings about incorrectly inferred variable types.
* Increased info.json download timeout to 10 seconds.
* Be a good netizen and send the "Accept: application/json" header when asking for the info.json file.
* Don't check the plugin's version on every pageload. Too slow (get_plugins() scans all likely-looking .php files, which can be a lot).
* Pass the return value of wp_remote_get() as the second arg. of the result filter callback.
Yahnis Elsts