Allow explicit (non-global-variable) threading of the logger tree hierarchy #10
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In trying to use hslogger and the GHC API together, I found that the global
logTreestructure was being created repeatedly and independenly (presumably due to fun interactions between unsafePerformIO and compiled/interpreted code), which made hslogger impossible to use.This patch makes it possible to avoid using unsafePerformIO altogether by explicitly passing the logger tree hierarchy around.