We need to lookup the moving accumulator, of course.

This patch changes the RAPI endpoint return the same data format as the
input files. This will allow using it instead of the files.

This patch changes the format of the input node and instance lists. It
removes the list of primary and secondary instances from the nodes, and
adds the primary and secondary nodes to the instance list.

This is done so that we can have the same input data from commands as
from the RAPI.

This is the initial import of release 0.0.3.