Merge pull request #3 from ZJONSSON/master

Node.js version
imposted the isn2wgs module by @gudmundur to make the code more modular
Fixed the center geolocation
isnet93_to_wgs84.js removed
Merge pull request #4 from kristjanmik/master

Removed isnet93_to_wgs84.js for isn2wgs by @gudmundur