Preserve previous results, intermediate writes
Preserve previous results, intermediate writes

- Load the results JSON beforehand so that those are preserved if those
  algorithms are not being run in that experiment run.
- Write the experiments to file in between so that any errors with large
  stack traces, etc. do not cause the experiments to be thrown away.
  This makes it safer to keep it running a lot of experiments for
  a while.

timvandermeij/sentiment-analysis,timvandermeij/sentiment-analysis