generic link identifier $conn changed to $backyardConnection ($conn temporarily left here for backward compatibility)
database connect string to be used as an array $backyardDatabase instead of generic $dbhost etc. variables in order not to confuse it with system credentials of the application that is using backyard
first steps for integration of social.login.php into backyard
jQueryMobile 1.3.1-local added
This array must be created by the application before invoking backyard
$backyardDatabase = array(
    'dbhost' => 'localhost',
    'dbuser' => 'user',
    'dbpass' => '',
    'dbname' => 'default',
);
$dbname obsoleted in favour of $backyardDatabase['dbname']
libraries necesary for login_facebook.php and login_google.php called relatively according to the __BACKYARDROOT__ (so that they are properly included regardless the source application - it may also be an API)
Better function description