dependency check

[Christian-B]

https://spinnakermanchester.github.io/development/devenv6.0.html

List as dependencies
rig
future
futures
six
enum34
enum-compat
tzlocal

as do many of our requirements.txt

There are so stragglers in code such as
from future import print_function
from six import add_metaclass

[Christian-B]

neo>=0.5.2,< 0.7.0 in doc while neo >= 0.5.2, < 0.10.0 in requirements

[rowleya]

I think if you do python setup.py develop in each repository, you shouldn't need to pre-install dependencies, so maybe the docs should just remove this.