Errors handling now only with Common::Error.
Added travis.yml.
Push to initiate building.
Buildfix of travis.yml. Didn't cd.. after building opcua-mappings.
try to install boost at travis-ci.
removed header <chrono>. from thread_test.cpp
Reverted Wait for data.
small improvements in add_object
Merge pull request #2 from treww/master

Throwing only Common::Error.
Merge branch 'master' of https://github.com/FreeOpcUa/opcua-core