"Using 3rd-Party Libraries" guide added
"Using 3rd-Party Libraries" guide updated
Missing "md" extension added for "Using 3rd-Party Libraries" guide part
Merge branch 'master' of github.com:yiisoft/yii2 into 1837-3rd-party-doc
Fix typo
more validation for password reset token in advanced app

fixes #2099
Merge pull request #2098 from marsuboss/patch-1

Fix typo
Merge PR #1981 branch '1837-3rd-party-doc' of https://github.com/klimov-paul/yii2

* '1837-3rd-party-doc' of https://github.com/klimov-paul/yii2:
  Missing "md" extension added for "Using 3rd-Party Libraries" guide part
  "Using 3rd-Party Libraries" guide updated
  "Using 3rd-Party Libraries" guide added
linked guide on 3rd party systems
allow installing jQuery 1.10 for IE support

fixes #1905