Start the rails development server when in a development environment

When `RAILS_ENV=development` the rake rails development server is
started up instead of Apache and Phusion Passenger.
Fix `run import` to properly import OSM XML files
Enable the rails development environment

Setting the `RAILS_ENV=development` environment variable is now
honoured: in a development environment the rails development server is
run on `run startservices`, otherwise the production setup using
phusion passenger and apache is started.