api: record user actions in ServicesHandler

Related to #397.
api: rename ServicesHandler to serviceList

Related to #289.
api: record user actions in CreateHandler

Related to #397.
api: rename CreateHandler to createService

Related to #289.
api: also record service endpoints in createService handler

Related to #397.
api: rename createService to serviceCreate
api: record user actions in UpdateHandler

Related to #397.
api: rename UpdateHandler to serviceUpdate

Related to #289.
api: record user action in DeleteHandler

Related to #397.
api: rename DeleteHandler to serviceDelete

Related to #289.
api: record user action in AddDocHandler

Related to #397.
api: rename AddDocHandler to serviceAddDoc

Related to #289.