Added handler to convert numeric fields#9

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PeteLawrence wants to merge 3 commits intoarithmetric:masterfrom

PeteLawrence:master

Commits on Feb 9, 2017

Added handler to convert numeric fields in Cloudfront logs to numbers, so that they can be handled as numbers in ES
PeteLawrence
committed

Commits on May 3, 2017

Made elasticsearch requestTimeout configurable
PeteLawrence
committed

Commits on Nov 16, 2018

Merge remote-tracking branch 'upstream/master'
PeteLawrence
committed