Added IE support to Feature/many markers issue 69

Really the important stuff is in the <head> where I load the shims and support the marker, window, etc. custom elements. Included the shim js files but ideally could find them hosted on CDN.

Note if we removed jQuery and Bootstrap we wouldn't need the event shim... We're not using these resources anyhow. 

Also note I tried converting these elements to divs and using classes, but everything kind of broke. Might be worth looking into because ideally directives support `ECMA`.