Add VC limit for each dungeon on a per-section basis.

[ewang2002]

One easy way to implement this is to have an array for each section (including the main section) where each element is of type

interface IDungeonLimit { 
    dungeonId: string; // the dungeon unique identifier
    vcLimit: number; // the VC limit
}

Then, to get the VC limit, we can do the following:

• check if there is a defined VC limit for that dungeon in the section
• if not, fallback to the default section VC limit

We can potentially extend this to include the ability to

• customize number of people that can get Nitro (right now, you can only customize it on a per-dungeon basis, not on a per-dungeon+section basis)
• customize number of people that can use Points to get in (same idea as above)
• customize number of Points needed to get in (same idea as above)