IMG DELETE FUNCTIONALITY ADDED

-Hovering over images reveals an 'X' button that can be used to
remove the image

-The addDeleteButton method (or whatever its called) also tacks an id
onto the delete button's target element. This will come in handy for
appending other buttons to the image.
UTILITY FUNCTIONS CREATED AND ENCAPSULATION

-utility functions added to:
 * count images in an element
 * create a list of image objects

-components of imgTxtHybrid are encapsulated
(cannot be accessed outside of the script)