Restrict _.union and _.difference to accept arrays only
Merge branch 'master' of https://github.com/jashkenas/underscore
Merge remote-tracking branch 'upstream/master'
_.partition iterator and context.
Merge pull request #1463 from braddunbar/partition

_.partition iterator and context.
Semicolons, style.
Merge pull request #1465 from braddunbar/semis

Semicolons, style.
Add _.matches link to sidebar
Merge pull request #1466 from cobbweb/patch-1

Add _.matches link to sidebar
Fixes #1470 — include minified versions in packages
Merge branch 'master' of https://github.com/jashkenas/underscore
Clarify _.each return
Merge pull request #1471 from ryanve/master

Clarify _.each return
Tweak a bit, remove failing test.
Update pick and omit to accept a predicate
Allow _.throttle to function correctly after the system time is updated
Merge pull request #1474 from braddunbar/array-methods

Union and Difference Accept Only Arrays
_.now is a utility method.

Alter the docs accordingly.
Merge pull request #1475 from braddunbar/now-utility

_.now is a utility method.
_.partition only accepts arrays.