Set timestam in browse description at commandline client.
Added new functions for converting to string
updated convrting to strings.
Merge branch 'master' of ssh://192.168.1.33:/home/treww/work/freeopcua
Merge branch 'master' of https://github.com/freeopcua/freeopcua
Unified classes creation with using addons.
Merge branch 'master' of https://github.com/freeopcua/freeopcua
Proxiing AddressSpace methods with callback from addon to AddressSpaceInMemory. DataChangeCallback hcndle made memeber because intialization of static ariables inside methods are not thread safe.
Fixed order of addons deinitialization according to dependencies. Fixed couple of unhandled exceptions int the opc_tcp_asyn addon that lead to stop processing of network messages.
Merge pull request #66 from oroulet/master

Clean output
Merge with master.
Addded checks for timer deinitializations.
Fixed subscriptions. Created class of threadsafe PeriodicTimer. Updated creation of common addons. added to the tests creating subscription server because of failing some of them.
Added tests of DataChangeCallback and ValueCallback of AddressSpace.
Updated readme: added instruction how to install server.
Removed debug traces during parsing endpoint parameters when debug disabled.
Merge pull request #62 from treww/master

Unified opcua servers creation with using addons.
receive and respond to republish request, although with an error message since it is not implemented yet