Define relative locations of the 1d + 2d pipeline outputs

The outputs from the 2d pipeline have to be passed to the 1d pipelines.  For this, the relative locations of the pipeline outputs have to be defined.  A few constraints:

• outputs should be in a rerun directory
• there will be multiple 1d reruns based on a single 2d rerun (e.g., run lam1d multiple times tweaking params on a single set of data processed by 2d)

There may be other constraints we need to consider.