##Notes on changes:

Best to run a diff on everything in the top 87 lines. I had to convert all http to https, which meant finding new libraries in a variety of places.

###Leaflet upgrade

I've updated the leaflet library to 0.7.7 using this site as a guide; however, if I upgrade to any newer verion, I get an error message:

Uncaught TypeError: Cannot read property 'trim' of undefined
    at Object.trim (leaflet.js:5)
    at Object.splitWords (leaflet.js:5)
    at e.on (leaflet.js:5)
    at e.initialize (leaflet.markercluster.js:6)
    at new e (leaflet.js:5)
    at Object.L.markerClusterGroup (leaflet.markercluster.js:6)
    at index.html:262

This needs to be investigated.

###Changed link to buttons:

changed "FIP Legend" link to https://library.mcmaster.ca/collections/fire-insurance-plans#tab-key-symbols
changed "Contact" link to https://library.mcmaster.ca/services/maps-geographical-resource-services#tab-instructional-support

###Changes from http to https:

change all http://library.mcmaster.ca/maps/airphotos/thumbnails/image_not_available.png to https://library.mcmaster.ca/maps/airphotos/thumbnails/image_not_available.png
change all http://digitalarchive.mcmaster.ca//// to https://digitalarchive.mcmaster.ca////