Add improbable helpers#1

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ains wants to merge 3 commits intov1from

improbable_current

Commits on Jan 8, 2017

Add improbable helpers

ains
authored and
Ainsley Escorce-Jones
committed

Commits on Apr 11, 2017

Match improbable internal tree
Ainsley Escorce-Jones
committed

Commits on Aug 11, 2017

Allow context to set the request so we can pass context down
Zhou Yu
committed