event listener on markers for directions

- on click, api is pinged for directions from each human location
- the route is drawn upon ajax success
renaming featureLayer to the more explicit venueLayer
comments removed
passes a number instead of the startingpoints array

- can use the number within the method to find the appropriate data
displays the steps from the directions on the dom

- each step is created as a div with an icon at the front of the text
- adds minimal styling to the steps
- the instructions are coming back as html
basic styling for fonts in steps
updates README.md

- switch from single page app hosted on github to a node app running on heroku
- updates technologies
Merge pull request #35 from waneka/directions

Directions