Fix Minecarts

Minecarts are just too costly for their speed, as you only travel 8m/s with fully powered rails, whereas sprint jumping is 7.1m/s with so much as just a need for food. The amount of iron you need for a functional mode of transports over hundreds of blocks is simply too much, and by the time late game comes around and you get enough iron, you probably already have an elytra!

Please Mojang, Faster minecarts along with better rail functionality would make the game mechanic so much more enjoyable, and 7 year old me making giant roller coasters in a jungle would be so much happier.

Thank you, 
Atticus