…ebug-view

add a debug_request view that prints the request.

updated polls xblock version on mcka

Unfork help modal

…-attempts-fix

Proversity/problem attempts fix

#753)

This doesn't make metrics-sending *work* under 3.5 (capture_output isn't
supported on that version, for instance) but it does prevent the presence
of the script from breaking instrumented make targets. As long as the
script loads and the main method runs properly under 3.5, try/else blocks
can handle any other incompatibilities.

Some people still use Python 3.5 with devstack, possibly by accident,
even though devstack is supposed to be on 3.8 now.  Much of devstack works
with 3.5, even if requirements can no longer be installed, so someone who
has docker-compose installed externally and doesn't use a virtualenv may
not notice the environment mismatch.

While we'd like people to upgrade to 3.8, the metrics script should at
least not break their workflow in the meantime, since it is optional.

Also: Note python 3.8 requirement in README while I'm at it.