Add a second index for the browser.

[carlonluca]

Related to #75.

[brakmic]

Hi @carlonluca ,

I wanted to let you know that I've forked the project and it now supports the browser by default, with no need to create separate JavaScript outputs.

You can test it with npm run serve to open a web page.

You can check out the forked project here: CSV Writer Portable. It might have what you need.

Best,
Harris