take port from endpoint configuration
Merge branch 'master' of github.com:FreeOpcUa/freeopcua
use unique_ptr for subcsirption, they should be unique since they have a callback
seems to to be common to flag callback as const.. so did it
cleanup
fix handling av value to datachange event
fix delete monitoreditem
Merge pull request #33 from oroulet/master

fix in opcuaserver, use unique_ptr for subscriptions