Issue #1850542 by rodrigoaguilera: Added ability to retrieve favorite tweets from a Twitter account.

Issue #1850738 by joe-b: Fixed twitter_connect() empty on cron (Call to a member function user_timeline()).

Added twitter_api_keys() to check if the Application keys are set.

Added support to retrieve user mentions from Twitter plus a Views display to list all tweets.

Added some docblocks and removed unneeded checks related with OAuth.

Issue #444248 by Todd Nienkerk, erantone and juampy: Add rel="nofollow" and target="_blank" to all links within messages

Added an input format to add rel="nofollow" and target="_blank" to all links within a Tweet.

Updated Twitter Actions submodule to use API 1.1.

Updated Twitter Signin submodule to work with the 1.1 api.

Managed to add new Twitter accounts using the new API library.

Conflicts:
	twitter_signin/twitter_signin.pages.inc

 * In Twitter::status_update(), we do not return a TwitterStatus object unless twitter::call() was successful.
 * Update other calls to $this->call() to behave similarly.
 * In twitter_post_node_insert() we check the result of twitter_set_status() rather than using a try/catch block, because that happens at the API layer.

Issue #1814642. In some cases (eg overlong status update) we can get better information from the JSON response than from HTTP error.

Issue #1397634 improvement; if the user is authenticated then we should return them to the page where they were attempting to associate a Twitter account.

Added a command to search on Twitter.

Issue #1372516 by Michael.Kling: Added twitter_set_status() should return informations about the twitter status.

twitter_set_status() now returns the response from Twitter API.

Issue #1383992 by Manuel Garcia | Brian Altenhofel | steinmb | Peter Polman | juampy: Error when adding an account: PDO Exception: Integrity constraint violation in twitter_account_save().

Improved the way Exceptions are treated so the user can see what
is the error returned by Twitter (such as bad request, no connection,
tweet too long, too many requests and many more.)

Issue #1397634 by chia, Joe Weitzel and pfrenssen: Errors on oauth callback url when user denies access.

* Simplified the user_save() statement.
* Added a message in which the password and a link to reset it are given.

Added hook_user_delete().