install sphinx for documentation CI job

16 jobs for master in 5 minutes and 22 seconds
Status Job ID Name Coverage
  Build
passed #41473
Linux
build-2.7-linux

00:01:20

passed #41474
Apple
build-2.7-macos

00:02:20

passed #41471
Linux
build-3.5-linux

00:01:22

passed #41472
Apple
build-3.5-macos

00:02:22

passed #41470
VS2017
build-3.6-VS2017

00:01:39

 
  Test
passed #41478
Linux
test-2.7-linux

00:00:07

passed #41479
Apple
test-2.7-macos

00:00:11

passed #41476
Linux
test-3.5-linux

00:00:09

passed #41477
Apple
test-3.5-macos

00:00:12

passed #41475
VS2017
test-3.6-VS2017

00:00:12

 
  Deploy
passed #41483
Linux
deploy-2.7-linux

00:00:03

passed #41484
Apple
deploy-2.7-macos

00:00:02

passed #41481
Linux
deploy-3.5-linux

00:00:03

passed #41482
Apple
deploy-3.5-macos

00:00:01

passed #41480
VS2017
deploy-3.6-VS2017

00:00:02

passed #41485
Linux
deploy-documentation

00:00:12