add circleci config.yml with Jest test summary setting#4

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rng-trioxis wants to merge 4 commits intomasterfrom

setup-circleci-and-test-summary

Commits on Oct 25, 2017

add circleci config.yml with Jest test summary setting
Ray NG
committed

Commits on Oct 26, 2017

fix identation
Ray NG
committed
add jest-junit in package.json
Ray NG
committed
change checksum to package.json
Ray NG
committed