Add Instapaper support. - #40

I use pocket! can you add support please :)?

Hi - I won't be adding any bookmarking/social sharing stuff to master at this time.

Feel free to keep this in your branch; the code looks good, but it does not align with the current vision for the project.

Thanks!

I totally understand your vision for the project. But for people who want those features, I started a small chrome extension 😉

https://github.com/bitboxer/chrome-stringer-socialize

stringer is totally anti-social, man! :)

I'm kidding, nice extension, btw, @bitboxer.