[added] [MAP] Echo Echo Canyon & Shroomba Cave

[sstair]

I got tired of getting lost, so I made a quick map for the Echo Echo Canyon and Shroomba Cave in Greater Faydark.

I also added availablepriority="3" to the Greater Faydark newbie map, because it was stealing priority in the northernmost part of the cave.

<ImageStyle Name="exp03_rgn_greater_faydark_1" zonerect="-288, -1150, 638, -111" availablepriority="3" availablerect="-288, -1150, 638, -387">
<ImageFrame Name="imageFrame" Source="images/maps/map_exp03_rgn_greater_faydark_newbie.dds" SourceRect="0,0,436,506"/>
</ImageStyle>