main app - new service: analysis

handles user activity response, does calculations, prepare data for
highchart
main app - importing JSPath

https://github.com/dfilatov/jspath
main app - new service: utility

utility functions goes here
main app - new service: options

chrome application option operations (e.g. customizing api url -
localhost or live api)
index.html - included new scripts
updated api / register endpoint

returns error when username is already taken