fixed radar bugs

only player who opened server can see the radar:
solved by sending own role via rpc every 5 seconds. Therefore players
who recently joined eventually receive the information and can display
their radar appropriately.

other players don’t see their own radar, yet the player who opened the
server can see all of them:
fixed by if(networkView.isMine) around certain code blocks

as not all roles are recognized in the beginning, their radars remain
at the starting point until used. possible solutions: don’t start the
game (and the radar) until all 4 players joined - or hide radar, if
other players have not yet joined the game:
should resolve itself as soon as all players participate in the game.
fix or workaround currently not needed. (purely visual issue).