doc: add note about python installer
Ref: https://github.com/nodejs/CTC/issues/147#issuecomment-310482266
Checklist
-
documentation is changed or added -
commit message follows commit guidelines
Affected core subsystem(s)
doc,meta
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Ref: https://github.com/nodejs/CTC/issues/147#issuecomment-310482266
doc,meta