Update 1992/kivinen

When I started the program I noticed that it ends very quickly. Yusuke
Endoh provided a patch that calls usleep(). I felt that this was too
slow so I added a macro at the Makefile, Z, default 15000, so one can
reconfigure it. Thank you Yusuke!

I also noticed that when starting the game it moves towards the right
and then exits. Yusuke pointed out that if you click the mouse it moves
back towards the centre. I added this to the bugs.md file. Thank you
Yusuke!

Fixed formatting of README.md file.

1992/kivinen/kivinen.c

@@ -36,4 +36,4 @@
       XUnmapWindow		   (d,s[w])		  ,s[w]=0,c--:
       0,l=1; if(!x&&l)j=			    -j,l=0; if(l&x&&!v
       )u=~19,c--,l=0;t=(!x||!v)		     &&(y<5&&t<0||y>95&&t>0)?0
-	  :t;s[1]?X(1,y+=x&v?t:t/(x+1),130):ext(++c);};return(c);}
+      :t;s[1]?X(1,y+=x&v?t:t/(x+1),130):ext(++c);usleep(Z);};return(c);}