Also remove include/simgrid.h on make uninstall.
Fix cpu issues with VMs
ensure processes are still alive before altering their communications from another one
avoid changing smpi process index to handle finalization, as this lead to problems
allow replay to handle -1 as a value for the size of a receive.
The real size will be determined by probing the first incoming message from the sender.
This is used to keep compatibility with tools that don't store the size on receiver's size
remove tests to avoid spending too much time testing this again and again. Saves one minute at least