Include more words than before about Windows

- Tell people to use WSL
- Unless they don't, in which case give them hope
- (I wrote this commit on WSL)

Closes #130
5 jobs for 2.2-dev in 2 minutes and 58 seconds
Status Job ID Name Coverage
  Test
passed #2769
Go-py2.7

00:01:40

passed #2770
Go-py3.4

00:01:35

passed #2771
Go-py3.5

00:01:36

passed #2772
Go-py3.6

00:01:35

 
  Lint
passed #2773
Go-flake8

00:01:17