Add "tweet this" button to index.md

[yochannah]

Inspired by https://twitter.com/jjmerelo/status/994605979953254405 - can we add a "tweet this" button with similar text to what @JJ used?

The file to edit: https://github.com/codeisscience/manifesto/blob/master/index.md

You can use this site to generate the button: https://publish.twitter.com/?buttonType=TweetButton&widget=Button

if you want to pick up this task

1. Comment on this issue stating that you intend to work on the task
2. When you're ready, add your work to the repo and create a pull request.
3. Bask in glory and email me your address if you'd like to have some codeisscience stickers for your trouble. <3

What to do if you need help

Mention @yochannah, tweet @yoyehudi, pop by to say hi on gitter or if needed email yochannah@gmail.com <3

[Ilozuluchris]

Hi, I wish to work on this

[yochannah]

Awesome, feel free to get started! I'm travelling to the sprint site in london for the next hour or so but I'll do my best to answer any questions.

On Fri, 11 May 2018, 08:12 Chris Ilozulu, notifications@github.com wrote:

Hi, I wish to work on this

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/codeisscience/manifesto/issues/23#issuecomment-388281054, or mute the thread https://github.com/notifications/unsubscribe-auth/AI14joXHWvM4c79lj_LmeoNgpSaSxoR9ks5txTnNgaJpZM4T6-rC .

[JJ]

Maybe something like this:

<a href="https://twitter.com/intent/tweet?button_hashtag=codeiscience&ref_src=twsrc%5Etfw" class="twitter-hashtag-button" data-size="large" data-text="I adhere to the #codeiscience manifesto" data-url="https://codeisscience.github.io/manifesto/" data-related="codeiscience" data-show-count="false">Tweet #codeiscience</a><script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>