Sales process docs
Sales process docs added and then linked to handbook.
Because of https://dev.gitlab.org/gitlab/organization/issues/190#note_45941 https://docs.google.com/document/d/1F0vXw58ctLfk9LKrh35kOSjYvdah4skGGUt46l1-4GM/edit
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Sales process docs added and then linked to handbook.
Because of https://dev.gitlab.org/gitlab/organization/issues/190#note_45941 https://docs.google.com/document/d/1F0vXw58ctLfk9LKrh35kOSjYvdah4skGGUt46l1-4GM/edit