Add custom Seal Order handling to Diablo and DiabloHelper

[jmichelsen]

There are two scenarios where a custom seal order comes in handy, that I've found:

1. You want to clear the seals as fast as possible and just get to Diablo (for mf). With multiple bots, they can each take a seal or two, and meet up at Diablo when the seals have been finished.
2. Your bot struggles with a specific seal boss and you want to do things in a certain order. You can put the boss the bot struggles on last in the order and if it does end up chickening, the run won't end too quickly and cause realmdown.

Additional config vars added in this change:
Config.DiabloHelper.OpenSeals // This allows you to control whether or not a helper will open seals. Useful for if your helper is assign seal x and the main bot is assigned seal y, z. (default: false)
Config.DiabloHelper.SafePrecast // Previously, helpers would always warp to a random WP and precast, but they'd also precast during their run. If you want to disable their safe precast, set this to false (default: true)

Implementation details:
SealOrder is checked to see if a specific order has been defined. The default order is the old order, viz/seis/infector. If a user defined order is in place, that order is followed. The order is respected even
if less than three seals are listed. If Diablo is not found, all the seals are checked in the default a second time.

SealOrder can contain seal bosses by name, or number. 1==vizier, 2==seis, and 3==infector