Fix for device attach logic, adding display device init

+ * Version 1.0.14:
+ * Date: 12th Apr 2013
+ * Compatible/tested with Spokes SDK version(s): 2.8.24304.0
+ * Changed by: Lewis Collins
+ *   Changes:
+ *     - Minor fix to establish when _not_ on softphone call on device
attach
+ *     - Added initialization of display devices (dialpad devices) in
case user
+ *       wants to use CallRequested event (call dialled) from those
devices