#Service Access Layer
The service access layer is to cooperate each service entity to communicate with others via REST APIs.

###Data Service Access

    d(resource, method, params, callback)

###Application Service Access
    app(resource, method, session, params, callback)

###Presence Service Access
    prs(resource, method, session, params, callback)

###Communication Service Access
    comm(resource, method, session, params, callback)
#Service Access Layer
The service access layer is to cooperate each service entity to communicate with others via REST APIs.

###Data Service Access

    d(resource, method, params, callback)

###Application Service Access
    app(resource, method, session, params, callback)

###Presence Service Access
    prs(resource, method, params, callback)

###Communication Service Access
    comm(resource, method, params, callback)
Remove parameter session of service.prs and service.comm
Remove parameter session of service.prs and service.comm
