Minor update to sphinx dependency
commitf0e7a689436bd777523610feefd93b30227f6ece
authorMark Abraham <mark.j.abraham@gmail.com>
Tue, 10 May 2016 15:40:05 +0000 (10 17:40 +0200)
committerMark Abraham <mark.j.abraham@gmail.com>
Tue, 10 May 2016 15:40:05 +0000 (10 17:40 +0200)
tree9136703da564cf6ffa4d5a818458e5737a465577
parentb45128abcd98bd4dd180e3c4b0d4c2ab2018f508
Minor update to sphinx dependency

Jenkins is using a new version of sphinx, and that warns that pngmath
is deprecated. So we replace that with the suggested imgmath.

Change-Id: I40dbc5f04565391535ea7d59aba0d23a3a206805
docs/conf.py