Update ZEL info.json

Source:
https://coinmarketcap.com/currencies/zel/

blockchains/zelcash/info/info.json

@@ -1,28 +1,28 @@
 {
-    "name": "",
-    "website": "",
-    "source_code": "",
-    "whitepaper": "",
+    "name": "Zel",
+    "website": "https://zel.network/",
+    "source_code": "https://github.com/zelcash/zelcash",
+    "whitepaper": "https://zel.network/docs/zel_whitepaper_v2_English.pdf",
     "explorers": [
         {
-            "name": "",
-            "url": ""
+            "name": "Zel Explorer",
+            "url": "https://explorer.zel.cash"
         }
     ],
     "socials": [
         {
             "name": "Twitter",
-            "url": ""
+            "url": "https://twitter.com/zelcash"
         },
         {
             "name": "Reddit",
-            "url": ""
+            "url": "https://reddit.com/r/zelcash"
         }
     ],
     "details": [
         {
             "language": "en",
-            "description": ""
+            "description": "ZelCash is the currency used to access the Zel ecosystem. As a Zcash-fork, ZelCash inherits the features of private addresses and transactions. The Zel ecosystem consists of the ZelCore multi-asset wallet platform and the ZelNodes computational node network which will run sidechains to power Dapps, smart contracts, and asset layers. The ZelCore wallet platform is free to use, and also has a subscription-based set of features that provide API access to major exchanges so that users can transact crypto where they want."
         }
     ],
     "data_source": "crowd"