Minor edits to docs

- Ensure that we remove instances of old docker setup

Closes #154
5 jobs for 154-docker-revision in 2 minutes and 29 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
passed #3503
Go-py2.7

00:01:23

passed #3504
Go-py3.4

00:01:25

passed #3505
Go-py3.5

00:01:25

passed #3506
Go-py3.6

00:01:26

72.0%
 
  Lint
passed #3507
Go-flake8

00:01:02