HBF, improving usability

Trying to improve the usability of the menu

Binaries and sources can be downloaded at the moment from SugarSync, from readme:

BB)

• TSprite.Cached was accidentally removed, fixed
• Resolution can be changed on the fly via TGraphicDriver.Instance.ChangeResolution()

HBF)

• Hover, new enemy 
• Blobs removed, silly ending
• Spotlight colors are generated in real time
• Spotlight now slow downs hero when touching
• Demon lava splashes correctly
• Coins issue fixed (rotated ones were not counted properly)
• New interfaces IGameSprite, IHero and IShield 
• Resolution can be changed in the menu 
• Volume can be changed in the menu