Added minimal node.js web server. Run WebContent/startserver.cmd to start it. This fixes same-origin problems when running from disk.

Signed-off-by: Adrian-M <adrian.marotzke@tuhh.de>
Fixed renamed node_js_server.js
Added Firefox only to web server usage, Chromium currently does not work, run from file instead.
Merge branch 'master' of https://github.com/LukeOwncloud/SvgNaviMap
Fixed typo in README.md