Re: side effects through local() or parse() from times module

[GULPF]

This happens because the proc fields of `times.Timezone` isn't marked with 
`noSideEffect`. The same thing happens if you try to do anything with streams 
inside a `func`, since streams also use proc fields without `noSideEffect`. 
This could be changed, but imo Nims effect system isn't worth bothering with, 
just use `proc` instead. Every time I try to use the effect system I just get 
frustrated.