Adding ESRI map component

I've created an "images" object, changed Aubrey's code to use this new object, but left the three arrays in case she wanted to use them in her presentation as an intro to arrays. 

It is bad practice to have a require statement underneath existing code, but I didn't know if moving code around would confuse the students. Thoughts? If we did move the photo selector code into the require statement, we could have the map zoom to the point if a user selects a photo from the drop-down.