_.matches shouldn't throw on null values.
Tests also cover undefined.
Merge pull request #1568 from braddunbar/matches-null

_.matches shouldn't throw on null values.
Support arguments Object in _.isEmpty.

Fixes #1533.
Merge pull request #1573 from janraasch/feature/is-empty-arguments

Support arguments Object in _.isEmpty.
Tweak to taste.
Minor _.result optimization :)

Don't hate me

Mentioned this in #1515 a couple weeks ago
Merge pull request #1578 from megawac/result-optimization

Most minor _.result optimization :)
fixes #1575: underscorejs.org toc items way too wide
Automatically rewritten for npm.