Add icon pack

[justinh5]

For #25. They're a bit minamalistic haha.

[benbarth]

@justinh5 I just added the icons to the README on your branch. It looks like the sticker icon has white pixels around the black pixels. The icons will be displayed on a black background as well. https://benbarth.github.io/hacktoberfest-swag/ Can the greyscale icons be closer to half white and half black?

[justinh5]

@benbarth Yes that's a problem. My concern with using midtones is that they'll look washed out if they are to work with both black and white backgrounds. Also there seems to be a problem with the tshirt and socks icons not rendering. I'll try to fix it.

[justinh5]

Okay the greyscale icons should work for both dark and light backgrounds now. What do you think? @benbarth

[benbarth]

I think they look great! Thanks @justinh5!
If you think the icons are ready, I'm ready to accept the PR. Can you fix the merge conflict?

[justinh5]

Sweet! Fixed the conflict. They're still not perfect, but it's a start.

[benbarth]

Merged! 🎉
Thanks again @justinh5! 🤜🤛
If you want to make any changes to the icons just send a PR.

[StrikerRUS]

Hi guys!

Seems that this PR accidentally removed info about OpenBazaar (#29) 😕

[benbarth]

Good catch @StrikerRUS! Fixed.