Add ShapeShift wallet

[firebomb1]

An open source and non-custodial wallet that has been supporting Doge for a long time, it integrates ThorChain too which facilitates swaps from other chains to Doge.

https://app.shapeshift.com/

I will make a PR for it.

Disclosure: I'm a contributor in the ShapeShift DAO, part of the Marketing Business Development workstream.

[firebomb1]

Few screenshots demonstrating Doge support (on Android, support is the same on iOS and in the browser):

[firebomb1]

We've updated our brand assets including the logo so I'm updating the logo in my PR.

(Note: It's slightly off center vertically to look centered when used in a circle/rounded-border context like it's the case on dogecoin.com)

[firebomb1]

Hello @qlpqlp , do you need more information or anything else to move this PR forward?

[qlpqlp]

No, thanks, i personally know that wallet and tested 😊

I will again ping @michilumin to review it also 🙂

[firebomb1]

Thanks for merging and publishing it! I'm noticing that I've mistakenly corrected the "new" logo above only in Chinese, so I've made a new PR (#334) to fix it in all languages. Really sorry for the inconvenience!