Various small changes after Amir review: add/remove command options, use...

Various small changes after Amir review: add/remove command options, use matplotlib 2.2.2 functionalities, fix doc
4 jobs for theo-cli in 25 minutes and 53 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Build
passed #132288
docker
build_linux_27

00:25:50

83.0%
passed #132289
docker
build_linux_36

00:25:28

83.0%
passed #132290
macosx
build_macosx_27

00:23:50

83.0%
passed #132291
macosx
build_macosx_36

00:23:18

83.0%