move data attributes callout into data attributes doc subsection
JS docs: add Options, Methods, Events subsections to nav sidebar
Fixed a typo in Sign-in page example

Fixed a typo in Sign-in page example
http://getbootstrap.com/examples/signin/
Merge pull request #15095 from gitaeks/master

Fixed a typo in Sign-in page example
Update npm-shrinkwrap.
grunt
bump version to v3.3.1
Merge pull request #15094 from twbs/js-navs

JS docs: add Options, Methods, Events subsections to nav sidebar
Merge pull request #15089 from twbs/data-attrib-callout

move data attributes callout into data attributes doc subsection