Separate src and build

[RobinBuschmann]

This is currently not possible because of the lack of code completion in web storm (2016.2) when defining a main entry point in some index.ts like:

export {XMLElement} from './models/XMLElement';
// ...

when used

import {XMLElement} from 'xml-typescript';

// XMLElement.??? no code completion here :(

but

import {XMLElement} from 'xml-typescript/models/XMLElement';

XMLElement.serialize( /* ... */); //  :)