refactor: move RateLimitExceeded to roundup.cgi.exceptions RateLimitExceeded is an HTTP exception that raises code 429. Move it to roundup.cgi.exceptions where all the other exceptions that result in http status codes are located. Also make it inherit from HTTPException since it is one. Also add docstrings for all HTTP exceptions and order HTTPExceptions by status code. BREAKING CHANGE: if somebody is importing RateLimitExceeded they will need to change their import. I consider it unlikely anybody is using RateLimitExceeded. Detectors and extensions are unlikely to raise RateLimitExceeded. So I am leaving it out of the upgrading doc. Just doc in change log.

recursive-include share *
recursive-include roundup *.py *.txt
recursive-include frontends *.*
recursive-include scripts *.* *-*
recursive-include scripts/Docker Dockerfile *.* *_*
recursive-include tools *.* base64
recursive-include test *.py *.txt
include test/pg_service.conf
recursive-include doc *.html *.gif *.png *.txt *.css *.example
recursive-include detectors *.py README.txt
include demo.py *.txt
global-exclude *.pyc *.pyo .DS_Store *.orig *.rej *~ \#* .flake8
include doc/conf.py doc/Makefile doc/requirements.pip doc/roundup-favicon.ico
include doc/format_config.awk
include locale/*.po locale/*.mo locale/roundup.pot locale/Makefile