Take samples from haskell-te ASV runs

[Chris Warburton]

We should allow the following workflows for sampling:

  choose a sample (size/rep)             Pull sample names out of
           |                               haskell-te ASV JSON
           |                                         |
           |                                         |
           \--------------------+--------------------/
                                |
                                |
                                V
                           Sampled names
                                |
                                |
                                V
                         Fill in template
                                |
                                |
                                V
                      Run IsaCoSy from template
                                |
                                |
                                V
                           Store data

In other words, we should have a generic runner which accepts sampled
names, and we should have two potential sources of those names:
choosing a sample, and taking known names from some haskell-te ASV JSON.

The first way gives us a standalone tool. The second way lets us do
paired-difference testing with the two tools.