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
Merge branch 'master' of https://github.com/freeopcua/freeopcua
Simplfied send/receive messages on client side.
Partlially restored standard address space. Unit tests compiles. tests of opcua server part works. Doesn't pass standard address space tests.
First implementation of async client. Standard address space doesn't work.