django-hydra (WIP) (wating upstream merge)

[vindarel]

This is something I use extensively, I find hydras very useful. This one suggests to:

• run a manage.py command (with ido-completion)
• run a make target (if previous PR merged)
• switch to an elpy hydra to run tests (awaiting upstream)
• change the current virtualenv (the hydra shows what venv we're currently into)

all with one keystroke. So this is more for discussion and reference, until we can merge.