Merge pull request #7 from oroulet/master

expose high level subscription api to python
Merge pull request #8 from oroulet/master

enable callback, prepare for event support
build fix with after addin async client in the main trunk of freeopcua. Makefile in the tests folder runs unittests because it require building of test module test_opcua.so. Functional tests are started from top directory because it uses real python mopdule opcua.so
Merge pull request #9 from oroulet/master

add subscription test, fix some other tests
Merge branch 'master' of https://github.com/FreeOpcUa/opcua-python
Merge pull request #11 from treww/master

build fix with after addin async client in the main trunk of freeopcua.
support debug option in client
Merge branch 'master' of https://github.com/FreeOpcUa/opcua-python
add subscription test for client side. avoid one more server query in PyNode