Translated [Mixing Positional Audio and WebGL] into Japanese.
Added Japanese document.
Translated [Static Memory Javascript with Object Pools / Colt McAnlis] into Japanese.
Added Japanese document.
Translated [Effectively Managing Memory at Gmail scale] into Japanese.
resolved conflict
added Japanese title and translator name
Merge pull request #829 from agektmr/kuu-ja/tutorials/memory/effectivemanagement

Japanese translation for "Effectively Managing Memory at Gmail scale"