First version of 'viz' module
fix linux compilation errors
Merge pull request #1 from ozantonkal/viz

fix linux compilation errors
Initial implementation of keyboard callback registration mechanism without boost
boost dependency has been removed
Merge pull request #3 from ozantonkal/removing_boost_dependency

Removing boost dependency
fixed compilation (included ctime in precomp.hpp)
Merge branch 'viz', remote-tracking branch 'upstream/viz' into removing_boost_dependency