Just use one index.html page that has links to both frameworks

Currently once you've chosen a set of demos to explore (jQuery or Dojo) there is no way to navigate back to that page w/o using browser's back button.

In this PR, I've taken the content and links that were on `demo/jquery/index.html` and `demo/dojo/index.html` and moved it to `demo/index.html` and then linked all the individual demo pages back to that page.

It's easier to show than explain, so check out the [demos on my gh-pages](http://tomwayson.github.io/bootstrap-map-js/demo/).

Also, I found a couple of minor bugs in the demo pages and the first 2 commits in this PR fix those as well.