Add GEM Gems Token

https://etherscan.io/token/0xc7bba5b765581efb2cdd2679db5bea9ee79b201f
Closes #251

Author: freeatnet

Diff for: tokens/0xc7bba5b765581efb2cdd2679db5bea9ee79b201f.yaml

@@ -0,0 +1,23 @@
+---
+addr: '0xc7bba5b765581efb2cdd2679db5bea9ee79b201f'
+decimals: 18
+description: >-
+  Gems is a human task crowdsourcing protocol based on the Ethereum blockchain.
+  Gems will leverage the blockchain technology to disincentivize malicious actors
+  and reward fair players featuring a staking mechanism to ensure task completion,
+  a trust mechanism to track worker integrity, and a payment system to reduce
+  transaction fees.
+
+  Gems token (GEM) will be used as the utility token within the platform.
+links:
+- Blog: https://blog.gems.org/
+- CoinGecko: https://www.coingecko.com/en/coins/gems/
+- CoinMarketCap: https://coinmarketcap.com/currencies/gems-protocol/
+- Email: mailto:hello@gems.org
+- Reddit: https://www.reddit.com/r/GemsProtocol/
+- Telegram: https://t.me/gemsorg
+- Twitter: https://twitter.com/gems
+- Website: https://gems.org
+- Whitepaper: https://gems.org/whitepaper.pdf
+name: Gems Token
+symbol: GEM