Feature/extended configuration

Good idea, though we should keep an eye on this and if there are any mimeType related issues (see https://raw.githack.com/ for an explanation). My suggestion would be to add a gh-pages branch to the project https://github.com/52North/wps-config and load the file from there, i.e. eventually 52north.github.io/wps-config/schemas/v2/schema.xsd (we'd also have an archive there then and just save the current one as `schema.xsd` in the project.