allow passing report types through to istanbul, resolves #6
Merge pull request #20 from robrich/other-reports2

Final tweaks for #6, update README to document new features
Cleanup code
Release 0.2.0
Fix readme code highlighting
Pass all options through to Istanbul Instrumenter constructor

This allows options other than coverageVariable to be used without
specifying them all in this module.
Merge pull request #26 from rianmcguire/master

Pass all options through to Istanbul Instrumenter constructor
0.2.1
Update index.js

If there are no matching source files for a test then collector.add(...) tries to add an undefined object. since the collector just loops through the keys it should just skip over the supplied empty object from the  || {}.
Merge pull request #28 from ebertsch/master

Update index.js
0.2.2