improve introduction
move pythons and link them
fix installation instructions
add reference and next steps
move celery and rq to new folder
fix paths in celery
fix links in rq
add distributing work index
change toctree to distributing-work
fix links to celery and RQ
add info on extending the router
add note on extending router in distributing work
fix parameter table to use code blocks
add parameter table to celery docs
add 0.3.0 section to changelog
change method documentation
add documentation for RQRouter
Merge branch 'feature/documentation-redo' into develop