[OO] Hourglass - Working, scripted hourglass Version 2.0

Functioning hourglass

- Custom textures
- Very low prim usage (5 prims!)
- LOD optimized
- Lag-free custom script
- Falling sand particles
- Animated sand
- Working egg timer function (1-60 minutes)
- Menu driven setup

Carefully textured for the best sim performance!