edited for compatiblity to Windows with MinGW
use ua_statuscode as function return values
update statuscode
fix to debug option in cmake
finish usage of UA_StatusCode internally
Merge branch 'master' into statuscode

Conflicts:
	src/ua_connection.c
	src/ua_types.c
update nodestore_async to use ua_statuscode.
bettern error codes for sync nodestore
Merge pull request #132 from acplt/statuscode

Closing #131 with the pull.
Merge remote-tracking branch 'origin/master' into external_datasource

Conflicts:
	examples/opcuaServer.c
	src/server/ua_nodestore.c
	src/server/ua_nodestore.h
	src/server/ua_services_attribute.c
	src/server/ua_services_nodemanagement.c
	src/server/ua_services_view.c