A generic scan server for scanning any writeable attribute and reading
any list of attributes. The scan server supports step and continuous
scanning. It can do 1d, 2d or 3d scanning. Scannings are in general
linear but can also be along a pre-calculated trajectory. The scan server
coordinates all the actuators and sensors, reads out the data, writes
it to a file if requested and fits the resulting data.
The device server is ready for distribution application programmers.
The author will be interested in any feedback which arise from their
usage of this device server.