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.
Adds meta[rel=alternate hreflang] to tutorials
link instead of meta
Merge remote-tracking branch 'upstream/master' into i18n-semantics
Fixes #653 - adds a report for articles we are looking for contriubutors
Merge pull request #654 from html5rocks/article_report

Fixes #653 - adds a report for articles we are looking for contriubutors
Fixes #653 - adds a report for articles we are looking for contriubutors
Merge pull request #655 from html5rocks/article_report

Fixes #653 - adds a report for articles we are looking for contriubutors
Fixes #653 - adds a report for articles we are looking for contriubutors, some minor ammendments
Merge pull request #656 from html5rocks/article_report

Fixes #653 - adds a report for articles we are looking for contriubutors...
Updating the calendar
Merge pull request #657 from html5rocks/article_report

Updating the calendar
Fixed a small typo
Updating the calendar
Merge pull request #659 from html5rocks/article_report

Updating the calendar
Merge pull request #658 from dr4b/typo_fix

Fixed a small typo