[x] use ejs instead of jade as a default templating engine (or something else that can be used both at server and client side, and supports view partials)
[x] d3.geo to be used to draw the map (already in use in 1.x version of twitto)
[x] this first version will show an empty map on page load, to be then filled by js on the client.
A future separate issue will enhance this by pre-populating the map on the server with stored historical data (e.g. tweets from the past hours + stats)
setup express.js
A future separate issue will enhance this by pre-populating the map on the server with stored historical data (e.g. tweets from the past hours + stats)