Improving IstSOS Web API and finalizing IstSOS Javascript Core Library

My proposal consists of making some crucial changes (event handling, authentication...) to the IstSOS JavaScript core library, that will solve the most important issues of the IstSOS Web API (GSoC 2016 project). As a result, plan is to publish the library to the npm. Also, IstSOS Web Widget Creator is going to be rewritten and extended with some additional functionalities using modern JavaScript framework, specifically ReactJS. Final result, should be a modernized, completely functional and easy-to-use IstSOS Web API.