If which returns multiple values make sure they are readable
Fix extra parens, silly mistake
Update README.md

Changed "component" to "complement" in README.md
Re-document so that the typo fix in examples is put in the Rd
Merge pull request #7 from webbedfeet/master

Update README.md
Merge pull request #6 from jimhester/multi_which_error

If which returns multiple values make sure they are readable
Sort unique column IDs prior to label matching
Merge pull request #8 from aaronwolen/master

Column labels returned by spread() don't match values
Fix inline data
Add test for spread. #8
Merge pull request #5 from jimhester/master

Extract verb, to extract data from one column into multiple columns
Tests for extract
Clean up extract function a little