_.partition: include iterator and context arguments in the predicate
better naming
better language in tests
Removed reference to jslitmus.js

jslitmus doesn't seem to be actually used, in that tests run fine without it.
Merge pull request #1600 from hrj/patch-1

Removed reference to jslitmus.js
Swap argument order to match convention.

Fixes #1595.
Merge remote-tracking branch 'cool/master'
Tweak to taste.
Merge pull request #1601 from braddunbar/argument-order

Swap argument order to match convention.
Correct style issues.

* Use space in array/object literals.
* Convert a forgotten deepEqual candidate.
Merge pull request #1602 from braddunbar/style

Correct style issues.
Remove accidental global.
Merge pull request #1604 from braddunbar/accidental-global

Remove accidental global.
fix treatment of null/undefined destination in _.defaults and _.extend
respect iterator return value of Infinity/-Infinity in _.min/_.max
Merge pull request #1607 from davidchambers/extend-null

fix treatment of null/undefined destination in _.defaults and _.extend
Merge pull request #1606 from davidchambers/infinity

respect iterator return value of Infinity/-Infinity in _.min/_.max
document result of applying _.min or _.max to an empty list
Merge pull request #1619 from davidchambers/infinity

document result of applying _.min or _.max to an empty list
update _.has to return false for null/undefined

The current behaviour (throwing a TypeError) is not helpful, and likely
not deliberate.