Timeout for BatchVisualization

[WingRS]

It would be nice to implement a timeout for a cuboid/line visualization feature.
For example, it would look like this
void mrs_lib::BatchVisualizer::addCuboid ( const [mrs_lib::geometry::Cuboid](https://ctu-mrs.github.io/mrs_lib/classmrs__lib_1_1geometry_1_1Cuboid.html) & cuboid, const double r = 0.5, const double g = 0.5, const double b = 0.0, const double a = 1.0, const bool filled = true, const ros::Duration timeout = 1 )

The clearBuffer function is nice, but having an automatic option would be nice.

[stibipet]

Nice idea, done! #43