[added] Nu'roga Maps

[harczos]

it seems the zonerects are calculated wrong, probably for the default image size, instead of the actual 512x512. i could only get the correct zonerects for the first 3 levels on my kamikaze mission in a not yet cleared zone

<ImageStyle Name="exp05_dun_nuroga_0" displayname="Nu'roga 1" menugroup="Kunark" zonerect="-85,-59,110,60" heightmax="20">
<ImageFrame Source="images/maps/map_exp05_dun_nuroga_0.dds" SourceRect="0,0,512,512" />
</ImageStyle>
<ImageStyle Name="exp05_dun_nuroga_1" displayname="Nu'roga 2" menugroup="Kunark" zonerect="-85,-67,114,70" heightmin="20" heightmax="80">
<ImageFrame Source="images/maps/map_exp05_dun_nuroga_1.dds" SourceRect="0,0,512,512" />
</ImageStyle>
<ImageStyle Name="exp05_dun_nuroga_2" displayname="Nu'roga 3" menugroup="Kunark" zonerect="-81,-57,110,61" heightmin="80" heightmax="120">
<ImageFrame Source="images/maps/map_exp05_dun_nuroga_2.dds" SourceRect="0,0,512,512" />
</ImageStyle>