outdated nginx setup and configuration

[andreacampi]

nginx setup needs to be updated for router v2

[andreacampi]

It's a bit messy because we need a custom build of nginx with the LUA module, but I have something working.
Watch https://github.com/andreacampi/cloudfoundry-router-cookbook and https://github.com/andreacampi/cloudfoundry-router-cookbook/issues/1 for updates.