Fix flush_queue command to be able to run without specifying jobs option
added all files in /.idea as ignored files
- Updated slumber version in required library
- Updated test to support newer version of slumber
- Refactor flush_queue default jobs limit handler
- Correct Pylint errors
Updated project version
Merge branch 'develop' of github.com:jiitoey/django-async into feature/job-limit

Conflicts:
	setup.py
Merge branch 'feature/job-limit' into develop
Bump version number
Merge branch 'release/0.5.4' into develop