Init Japanese version-contrivutionday.
Translate to Japanese index.html
Translate steptwo to Japanese
Insert link.
Translate stepthree to Japanese.
Translate stepfour to Japanese.
Translate stepfive to Japanese.
Translate stepsix to Japanese.
Translate stepseven to Japanese.
Merge pull request #1 from mayuko-jpn/gh-pages

Add Jaanese translation