Updated "Defi in Saferoom" plugin

I have improved the "Defi in Saferoom" plugin.
Previously it only replaced a Medikit at map start (OnMapStart).
If the maps was restarted because all died no replacement was made because OnMapStart was not called.
Now it listens to "round_start" too.
Still in some custom maps the replacement does not work properly.
The debug says, that a medikit was replaced but maybe it replaced a medikit somewhere else in the map and not at the starting point.
Maybe I will have a look for some other possibility to ensure some defibs on our Realism servers.