* experiments: add initial local tmpdir executor
* fix detached head pull
* experiments: include unchanged (unrepro'd) stages in experiment hash
* experiments: repro single experiment using tmpdir executor by default
* stage experiments as stash commits before running
* include repro args/kwargs in stashed experiments
* support running arbitrary experiment commits (including stash commits)
* experiments: use ProcessPoolExecutor
* experiments: add `dvc exp` alias for `dvc experiments`
* experiments: add `dvc repro --experiment --queue`
* `--queue` can be used to stage an experiment for future execution
* experiments: show queued (unexecuted) experiments in `dvc exp show`
* revert ProcessPoolExecutor change
* experiments: add `dvc repro --run-all [--jobs]`
* `--run-all` can be used to run all queued experiments in parallel
* cleanup output
* experiments: use ProcessPoolExecutor
* fix returning unpicklable objects error
* update tests
* fix windows cleanup issue
* on windows tempdir cannot be removed if we are chdir'd into that
directory
Peter Rowlands (변기호)
c8d2f4f1fb