Fixed docs for every to show iterator is optional
Merge pull request #1063 from obmarg/every-doc-fix

Fixed docs for every/all to show iterator is optional
Fixes #1056, _.union being passed an arguments object.
Fixes #1049, new version of zip/unzip
Accidental global.
Remove unused function.
Fix #1097 - Clarify documentation for _.toArray.
Merge pull request #1098 from braddunbar/to-array

Fix #1097 - Clarify documentation for _.toArray.