Document how to build roller coasters

[halfbro]

There should be documentation covering how to build effective roller coasters.

This includes, but is not limited to:

• Controlling G-Forces
• Using Brakes
• Using Block Brakes
• Creating Launch Powered Coasters
• Creating Multiple Stations
• Creating Synchronised / Dueling Coasters

This is going to be a particularly large section, it might be useful to get some basic information down first, then we could add specific things in later (like how certain coasters get bonuses/penalties for # of inversions, how intensity can penalize excitement)