Add qunit to devDependecies and test script
Update linq.js
Fix test/set.js
Update sample and tests

Failing at the moment. Need to include extens/linq.qunit-test
Start getitng qunit to pass.. :(
Get specs passing.

selectMany spec is failing...
Merge pull request #4 from smdern/linq-v3.0.3beta

Linq v3.0.3beta