Added legacy 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.

@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.