Refactor _.partial.
Cache length.
Merge pull request #1422 from braddunbar/partial-refactor

Refactor _.partial.
Revert "use _.partial in definition of _.intersection"

This reverts commit 826f8ceba0699a8a09991015f19c8a10444c8076.
Remove jQuery dependency.
Merge pull request #1424 from braddunbar/jquery

Remove jQuery dependency.
Automatically rewritten for npm.