[TIMOB-5122] Add a member function to View called 'convertPointToView'

- name: convertPointToView description: translates a point from the receiver's view coordinate system to another view's coordinate system. If both views are connected in the native view heirarchies, will return the converted point in the form of an object with x and y properties. If either view is not in the view heirarchy, a null is returned. Keep in mind that views may be removed from the view heirarchy if their window is blurred or if the view is offscreen (such as in some situations with ). returns: type: [Object, null] parameters: - name: point description: an object with properties of x and y describing a point within the receiver's coordinate system. If this argument is missing an x or y property, or the properties can not be converted into numbers, an exception will be raised. type: Object - name: destinationView description: the view whose coordinate system to which the point will be converted. If this argument is not a view, an exception will be raised. type: Titanium.UI.View