Add _.sample(arr, number) function
Move loop side-effect into explicit clause.
Tests when `findWhere` can't find anything
add test case for _.intersection
Corrected comment about root being global on the server

The corresponding comment in the Backbone source was corrected on this point about 9 months ago (see: https://github.com/jashkenas/backbone/issues/1751)
Merge pull request #1211 from CSNW/root-is-exports

Corrected comment about root being global on the server
delete unused index.js

this hasn't been needed since d62906672b62c0e1c7817d74d3f1971cc3f132bc
Explicitly set the contents of the npm package
Merge pull request #1213 from sindresorhus/files-prop

Explicitly set the contents of the npm package
add big objects
Merge pull request #1221 from liuyl/speedjs

add big objects to speed.js
Fixes #1222 -- optimize  implementation to use native keys() where possible.
Merge branch 'master' of https://github.com/jashkenas/underscore
speedup underscore.js
speedup invert
Tweak _.pairs.
Merge branch 'invert' of https://github.com/liuyl/underscore
Style.
s/l/length
A few more length variables.