Removed an empty space (whitespace) preceding <?php which caused numerous issues for people by PHP throwing PHP Warning: Cannot modify header information - headers already sent by (output started at /my-home/wp-content/plugins/device-theme-switcher/inc/class.switcher.php:1) in /my-home/wp-content/plugins/device-theme-switcher/inc/class.switcher.php on line 176
Updated all the versions throughout the plugin to 2.7.1 for a bug fix release