Add support for vin/vout hashes inside an array

-Some blockchains store certain vin or vout addresses within an array instead of as a simple string which would cause them to be read improperly by the explorer and result in transactions that were not attributed to the proper address. It also caused multiple inputs/outputs from the same address in a single transaction to not be grouped together like other transactions in the explorer

lib/database.js

@@ -122,6 +122,12 @@ function save_tx(txid, blockheight, cb) {
           lib.syncLoop(vin.length, function (loop) {
             var i = loop.iteration();
 
+            // check if address is inside an array
+            if (Array.isArray(nvin[i].addresses)) {
+              // extract the address
+              nvin[i].addresses = nvin[i].addresses[0];
+            }
+
             update_address(nvin[i].addresses, blockheight, txid, nvin[i].amount, 'vin', function() {
               loop.next();
             });
@@ -129,6 +135,12 @@ function save_tx(txid, blockheight, cb) {
             lib.syncLoop(vout.length, function (subloop) {
               var t = subloop.iteration();
 
+              // check if address is inside an array
+              if (Array.isArray(vout[t].addresses)) {
+                // extract the address
+                vout[t].addresses = vout[t].addresses[0];
+              }
+
               if (vout[t].addresses) {
                 update_address(vout[t].addresses, blockheight, txid, vout[t].amount, 'vout', function() {
                   subloop.next();