Fowler–Noll–Vo hash for key lookup

[genius257]

https://github.com/nomi-san/true-autoit-multi-threading/blob/fda70b5c1ccab75dfae9edaaac0961926669da9a/src/shared.cc#L121

This AutoIt3 project uses FnvHash for display id lookup names.
This MAY be faster then the current solution, if the general loop speed related issues of AutoIt3 does not cause FnvHash to be slower.

Related to #10