Add DTH Dether

https://etherscan.io/token/0x5adc961d6ac3f7062d2ea45fefb8d8167d44b190
Closes #819

tokens/0x5adc961d6ac3f7062d2ea45fefb8d8167d44b190.yaml

@@ -0,0 +1,27 @@
+---
+addr: '0x5adc961d6ac3f7062d2ea45fefb8d8167d44b190'
+decimals: 18
+description: >-
+  Dether is a peer-to-peer ecosystem of crypto buyers, sellers and physical shops
+  that aims to make cryptocurrency commerce less time consuming, less complicated,
+  and less exclusionary towards unbanked peoples. Dether’s ether based network is
+  designed to allow users to buy ether with cash over and spend it at nearby
+  stores, all via mobile phones with internet access. Dether’s token, DTH, offers
+  utility functions.
+links:
+- Bitcointalk: https://bitcointalk.org/index.php?topic=2043651.0
+- Bitcointalk: https://bitcointalk.org/index.php?topic=2620895
+- Blog: https://medium.com/dether
+- CoinGecko: https://www.coingecko.com/en/coins/dether/
+- CoinMarketCap: https://coinmarketcap.com/currencies/dether/
+- Email: mailto:[email protected]
+- Facebook: https://www.facebook.com/dether.io/
+- Github: https://github.com/dethertech
+- Reddit: https://www.reddit.com/r/Dether/
+- Slack: https://dether.slack.com/
+- Telegram: https://t.me/joinchat/GkdUjUQ4jx_Apxmz2km4ww
+- Twitter: https://twitter.com/dether_io
+- Website: https://dether.io
+- Whitepaper: https://whitepaper.dether.io/
+name: Dether
+symbol: DTH