initial tests commit
adding postmessage shim as suggested,fixes #51
remove commented out code, fixes #34
Changes based on comments to PR
Merge pull request #58 from mozilla/fix-34

remove commented out code, fixes #34
Merge pull request #57 from mozilla/fix-51

adding postmessage shim as suggested,fixes #51
Merge pull request #52 from mozilla/mocha-tests

Mocha Tests for Scan.js
Merge branch 'master' into sortable
fixed a bug in scanworker from previous patch