Stu's Rusty Bucket

Fishguts I : Caching

A few tweaks and Ive added caching to file system layer, it came at a cost of about 10 lines of code, so its very nice. Cache size can vary by platform or disabled, its enabled only by request so I can specify only to cache the overland tileset + maps, which might save a lot of battery on the GP2X since it wont be hitting the SD card each time you cross a map segment.