Belt quality

Belts now affected by quality. Speed scaling formula: (X\*Y+1)\*Z Where X is quality level, Y is scaling factor per level , Z is conveyor belt speed in items/s.

Examples(scaling factor = 0.3 or 33% per level): Conveyor belt (common) - 15 items/s Conveyor belt (uncommon) - 19,5 items/s ((1\*0.3+1)\*15) Conveyor belt (rare) - 24 items/s ((2\*0.3+1)\*15) Conveyor belt (epic) - 28,5 items/s ((3\*0.3+1)\*15) Conveyor belt (legendary) - 37,5 items/s ((5\*0.3+1)\*15) P.S. Stepping from epic to legendary counts as 2 levels (quality.level) so x there equals 5. Etc. with other belts.

To do list: ~~-Add compatibility to other belts mods.~~(Done) -Add compatibility for loaders.(Partially done) -Add an option to make underground belts max distance affected by quality. -Make settings tab for mod(enable speed scaling,max underground distance scaling and their scaling factors in % etc.).(Partially done in 0.1.2 ) ~~-Rework or enhance conversion system to work more stable and provide more user-friendly experience.~~(done in 0.1.0) -Add a way to un-convert already converted belts.