Node launcher

[kruplm]

Story: "As a frontend developer I can configure the height, width, title and the URL of a browser window from my JavaScript application."

• the shell can be launched from Node.JS as well.
• width, height and title of the window can be specified.
• An url can be passed via configuration or by the LoadUrl() function
• The default config loading (with pre-existing manifest file) still works the same way - so that our future Universal hosting goals can be achieved.
• As part of this PR the manifest file parsing was also improved.