add all build* in gitignore
error in the documentation (component instead of system)
split System to handle the entity set separately
add a missing override for the accept method
adapt the examples to the new GlobalSystem
add missing licence in GlobalSystem.cc
add missing licence in SystemVisitor.*
return a copy instead of a reference in getEntities()
add a LocalSystem implementation
add a delta parameter to preUpdate and postUpdate
add a focus in the manager so that it can update local systems
update examples to handle the new delta parameter in preUpdate/postUpdate
Merge branch 'feature-grid-system' into develop
put the focus in the LocalSystem only
remove the system visitor
add function to add/remove local entities
reserve the memory for the entities
use resize instead of reserve to really allocate
allow to change the size of the grid
Merge branch 'feature-grid-systems-extra' into develop