translate js
fix some
add original doc
ja translation
Merge pull request #20 from mitsuruog/work

[監訳希望] JavaScript API
Merge pull request #21 from yukihr/master

executable の日本語訳
add original links
specify protocol for working link
remove original Title
correct review points
Merge pull request #22 from yukihr/master

executable.md にいくつかの修正を行いました