PR for #71 Log software + packages versions

[jc-cisneros]

This pull request closes https://github.com/gslab-econ/gslab_make/issues/56 and https://github.com/gentzkow/template/issues/71. This template branch is currently pulling the 56-version-log branch of the gslab_make submodule, so https://github.com/gslab-econ/gslab_make/pull/56 should be closed first.

The steps to test the new feature are the following:

• Clone template and switch to the issue71-log-version branch
• Create the template conda environment (i.e., run conda env create -f setup/conda_env.yaml from root)
• Load the submodule by running:

  git submodule init
  git submodule update

• Navigate to lib/gslab_make and run git switch 56-version-log (we are testing the 56-version-log branch of gslab_make). After that, run git branch. The current branch of the submodule should be 56-version-log.
• Go back to root and activate the template environment. Run check_setup.py from the setup module.
• Run run_all.py from root. Check the make.log and version.log files in each module.

Once the tests are successful, we can proceed to merge the 56-version-log branch of gslab_make to master, point the submodule to master and run the entire repo again.

I'm adding @snairdesai as a reviewer.

cc. @gentzkow

[snairdesai]

@jc-cisneros I've just finished testing this on the specified branch. Noting I deleted the cached version of my template environment and rebuilt from scratch in case any changes had been made to packages. Everything seems to work from my end. The only minor thing is there are some misalignments in the printing of versions for some of the longer package/build names. This is a small aesthetic detail we may consider fixing (for example, by adding more blank space between columns).

Thanks for the work - I'll proceed to the code review now!