Upgrade Celery version used from 3.1.26 to 4.1.1. The following
settings have been renamed: CELERY_ALWAYS_EAGER to
CELERY_TASK_ALWAYS_EAGER, BROKER_URL to CELERY_BROKER_URL.
Signed-off-by: Roberto Rosario <Roberto.Rosario@mayan-edms.com>
Fix spelling errors in documentation and other program texts.
Update the spelling exceptions list.
Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>