Japanese Translation

Hi, I just came across this repo and would love to contribute to the Japanese translation!

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EDIT: My friendly co-worker @kawamataryo kindly volunteered to work on the translation together!
Right now, we are working on a forked branch on my account here: https://github.com/yuichkun/javascript-testing-best-practices/blob/master/readme-jp.md

Progress

• Introduction
• Section 0
• Section 1
  • 1.1
  • 1.2
  • 1.3
  • 1.4
  • 1.5
  • 1.6
  • 1.7
  • 1.8
  • 1.9
  • 1.10
  • 1.11
  • 1.12
  • 1.13
• Section 2
  • 2.1
  • 2.2
  • 2.3
  • 2.4
  • 2.5
  • 2.6
  • 2.7
• Section 3
  • 3.1
  • 3.2
  • 3.3
  • 3.4
  • 3.5
  • 3.6
  • 3.7
  • 3.8
  • 3.9
  • 3.10
  • 3.11
• Section 4
  • 4.1
  • 4.2
  • 4.3
  • 4.4
• Section 5
  • 5.1
  • 5.2
  • 5.3
  • 5.4
  • 5.5
  • 5.6
  • 5.7
  • 5.8
  • 5.9
• Team