add mmocr link

[quincylin1]

added mmocr link to chinese and english readme

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[codecov]

Codecov Report

Merging #501 (af1499e) into master (83d312e) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #501   +/-   ##
=======================================
  Coverage   86.48%   86.48%           
=======================================
  Files          97       97           
  Lines        4974     4974           
  Branches      807      807           
=======================================
  Hits         4302     4302           
  Misses        519      519           
  Partials      153      153           

Flag	Coverage Δ
unittests	86.48% <ø> (ø)

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