Update HISTORY.rst

Added functionality to give a description in the progress bar (dfm#401)

* Update pbar.py

* Update ensemble.py

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Update ensemble.py

* Update pbar.py

* Update ensemble.py

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

removing logo from docs

removing logo from docs

updating changelog

adding contributor link to docs

updating tutorials

bumping RC number

Merge branch 'master' of https://github.com/dfm/emcee

bumping bugfix version