Converts co ordinates to geohashes

Converts lat longs passed into geo hashes. Provide a coordsarray and precision to /geohash and it returns a response which is an array of geohashes for the co ordinates

Setup:

1. Install node.js
   • Open the Terminal app and type brew install node.
   • To see if Node is installed, type node -v in Terminal. This should print the version number so you’ll see something like this v0.10.31.
   • To see if NPM is installed, type npm -v in Terminal. This should print the version number so you’ll see something like this 1.4.27
2. To install the project dependencies, type npm install
   
3. Start the server by executing npm start