Fix HGSS fishing encounter slot rarities.
Fix HGSS fishing encounter slot rarities.

<http://www.smogon.com/forums/showpost.php?p=2564048&postcount=215>
mingot has found the correct slot rarities for HGSS fishing encounters.
They are 40/30/15/10/5 for all rods. Surfing is the same as in DPPt.

xfix/pokedex,RK905/pokedex-1,mschex1/pokedex,veekun/pokedex,DaMouse404/pokedex,veekun/pokedex