Shortened version of unzip that doesn't create sparse arrays
Replace _.bind call with _.partial as suggested by @jdalton
Merge branch 'master' of https://github.com/documentcloud/underscore into unzip-no-sparse
Make use of _.times new found ability to deal with negatives
Merge pull request #1047 from almost/unzip-no-sparse

Shortened version of unzip that doesn't create sparse arrays