Add ZelCore to wallets as requested in issue #324

[milesmanley]

Adds ZelCore to the ecosystem/wallets section as requested in issue #324

[netlify]

Deploy preview for ethereumclassic ready!

Built with commit 1081978

https://deploy-preview-325--ethereumclassic.netlify.com

[IstoraMandiri]

Looks fine, but can we have it in one section or the other as opposed to having duplicate entires.

Thanks.

[milesmanley]

@hitchcott - Hey, why should it only be in one section if there is support on both iOS and Android as well as all desktop platforms, Windows, Linux and macOS?

[IstoraMandiri]

This is for consistency; right now there are other projects (e.g. Atomic wallet, Cononomi and JAXX) that have both mobile and desktop support but are only listed in mobile.

For now, please just put this in one or the other.

I will create a separate issue to create a third category for mobile and desktop.

[gitr0n1n]

We are revamping the website with a new content which includes a: /wallets page that includes with wallet in the "Software Wallets" section and this specific wallet.

See #328