Update classes/log.html
typo
installation/upgrade.html を修正
Update classes/log.html
validation/validation.html を一部翻訳
Merge pull request #278 from raben/1.6/develop_japanese

1.6/develop japanese
Merge pull request #279 from kenjis/fix_upgrade

installation/upgrade.html を修正
Merge pull request #280 from sharkpp/1.6/develop_japanese

general/extending_core.htmlを一部翻訳
Merge pull request #281 from tatsuyaueda/patch-3

validation/validation.html を一部翻訳
packages/orm/observers/included.html 一部修正
Merge pull request #282 from seckie/fix_orm

packages/orm/observers/included.html 一部翻訳
validation/validation.html を一部翻訳
validation/validation.html を一部翻訳
Merge pull request #283 from tatsuyaueda/patch-4

validation/validation.html を一部翻訳
Merge pull request #284 from tatsuyaueda/patch-5

validation/validation.html を一部翻訳
Update classes/module.html
installation/troubleshooting.html の修正
Merge pull request #285 from raben/1.6/develop_japanese

Update classes/module.html
Merge pull request #286 from kenjis/fix_trouble

installation/troubleshooting.html の修正
Update CREDITS.md

翻訳がマージされたので追記させていただきました。