Refactored TTexture to allow encoding sprite(s) at an arbitrary location within a (possibly shared) physical texture. The original variant only allowed encoding a sprite at the bottomleft of a larger physical texture to use NPOT sprites on POT only supporting systems.

sky = 0, 0, 0
border = 175, 177, 75
water-top = $2B, $2B, $2B
water-bottom = $2A, $2A, $2A
water-opacity = $CC
music = hell.ogg
clouds = 0
flakes = 50, 1, 1000, 50, 50
;1, 1000, 50, 50 are copied from bamboo theme, as these numbers are required