initial shared pointer implementation for Viz3d, singleton VizAccessor, cv::viz::get function initial implementation
remove redundant statement
cv::viz::get(window_name) implementation
fixes based on the feedback: window name prefix is automatically added when it is not there, singleton class returns reference instead of pointer, destructor is private, release function implemented
Merge pull request #19 from ozantonkal/acess_by_name_infrastructure

Acess by name infrastructure