django-debug-toolbar release requires django>=1.11

[Ed McDonagh]

https://django-debug-toolbar.readthedocs.io/en/stable/changes.html#id1

Need to pin django-debug-toolbar to version 1.9.1 for now.

[Ed McDonagh]

Pegging django-debug-toolbar to 1.9.1 for now as 1.10 requires Django >= 1.11. Refs #656

→ <<cset 404b3c7ff572>>

[Ed McDonagh]

Added ref #656 to changes, [skip ci]

→ <<cset be9baa2b7f61>>

[Ed McDonagh]

Fixed - will be in 0.8.1 from beta 2

[Ed McDonagh]

Merged in release-0.8.1b2 (pull request #216)

Release 0.8.1b2

Some fixes, lots of docs. Refs #647, #646, #647, #648, #649, #650, #651, #652, #653, #654, #656

→ <<cset d5db3ea11366>>

[Luuk]

Added ref #656 to changes, [skip ci]

→ <<cset a848567a911d>>