Improve error handling#16

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pkmnfrk wants to merge 2 commits intoaz64:masterfrom

pkmnfrk:errorHandling

Commits on Feb 21, 2019

add a top level error handler when randomizing the logic, in case it breaks. Relatedly, catch a situation where the randomizer gets stuck and can't place an item after 10,000 tries, and abort
pkmnfrk
committed
slightly improve the error message, to make it a bit more actionable
pkmnfrk
committed