Individual Icon import option

[afzaalb]

I've added all the icons as individual components and they can now be imported as
import ArrowLeft from 'react-bytesize-icons/lib/components/ArrowLeft'.

We can still import icons as we used to do previously, but the reason for doing this is when i'm only using 10 icons from a set of 94 icons my JS bundle increases significantly.
The icons bundle is almost 52K.Technically i should be importing those specific icons so i import few kb's from icon-bundle instead of whole 52K.
Hope my explanation is clear.
You can see the difference with both approaches in screenshot attached.

[Kilian]

Hi @afzaalb this is great! I have one requests though: make sure the import path is short, so it should be import Info from "react-bytesize-icons/info"; as that's much more discoverable. Can you also add a little to the README.md under 'how to use'?

[afzaalb]

Icons can now be imported as import Twitter from react-bytesize-icons/Twitter.I've also updated the readme and added a link to this PR. @Kilian

[Kilian]

I will make a new release in the next few days, Thanks again @afzaalb!

[afzaalb]

Thank You !