#422 (Mar 3, 2020, 11:43:03 PM)

1. programs can now pickle (commit: 9d92839) (details / githubweb)
2. cleanup solution array (commit: be7c840) (details / githubweb)
3. everything works (commit: d8bf702) (details / githubweb)
4. cleanup (commit: 983a92e) (details / githubweb)
5. add constraint differences (commit: efc9535) (details / githubweb)
6. unitless cost, small keydict speedup (commit: 4605d6e) (details / githubweb)
7. lint (commit: 5bb8c83) (details / githubweb)
8. clarify exceptions and make them easier to catch (commit: 0711480) (details / githubweb)
9. print exponent products (commit: 052b758) (details / githubweb)
10. small printing fixes (commit: ad8f61d) (details / githubweb)

GitHub pull request #1472 of commit ad8f61dcac4a33510e3bb85b0031043acf6192c9, no merge conflicts.