Set version to 0.2.6
Set version to 0.2.6

bassosimone/yaml-cpp,steinwurf/yaml-cpp,steinwurf/yaml-cpp,eacousineau/yaml_cpp_0_2_7,bassosimone/yaml-cpp,eacousineau/yaml_cpp_0_2_7,bassosimone/yaml-cpp,bassosimone/yaml-cpp,steinwurf/yaml-cpp,steinwurf/yaml-cpp