Merge branch 'master' into simon/angular-universal

* master:
  Tweak ASM opcode styling colors
  Add some color and styling to the Bitcoin ASM opcodes
  Correcting title text on graph invert button.
  Modify upgrade script to include "tag @ hash" in notification msg
  Adding a button to invert the graph globally.
  Display P2PK instead of OP_RETURN fixes #161
  Improved utxo script design. fixes #46
  Adding prevout script. Fixed padding. refs #46
  Correcting details button padding on mobile.
  Fix nginx.conf reverse proxy cache URL path for sponsor images
  Add missing "engines" metadata into package-lock.json
  Upgrade backend/package-lock.json to version 2
  Toggle display UTXO details and scripts for transactions fixes #46
  Axios error handle sponsor proxy requests.
  Replacing request.js with axios fixes #153
  Add basic websocket error handler as emergency fix for site crashing

# Conflicts:
#	frontend/src/app/services/storage.service.ts

frontend/src/app/services/storage.service.ts

@@ -7,12 +7,17 @@ export class StorageService {
   getValue(key: string): string {
     try {
       return localStorage.getItem(key);
-    } catch (e) { }
+    } catch (e) {
+      console.log(e);
+      return '';
+    }
   }
 
   setValue(key: string, value: any): void {
     try {
       localStorage.setItem(key, value);
-    } catch (e) { }
+    } catch (e) {
+      console.log(e);
+    }
   }
 }