Uses damus image on the homepage

Closes: #291
Changelog-Added: Damus icon at the top

damus/Assets.xcassets/damus-home.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "filename" : "damus-home@1x.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "filename" : "damus-home@2x.png",
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "filename" : "damus-home@3x.png",
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

damus/ContentView.swift

@@ -169,6 +169,19 @@ struct ContentView: View {
             }
         }
         .navigationBarTitle(selected_timeline == .home ?  NSLocalizedString("Home", comment: "Navigation bar title for Home view where posts and replies appear from those who the user is following.") : NSLocalizedString("Global", comment: "Navigation bar title for Global view where posts from all connected relay servers appear."), displayMode: .inline)
+        .toolbar {
+            ToolbarItem(placement: .principal) {
+                if selected_timeline == .home {
+                    Image("damus-home")
+                    .resizable()
+                    .frame(width:30,height:30)
+                    .shadow(color: Color("DamusPurple"), radius: 2)
+                } else {
+                    Text("Global")
+                }
+            }
+             
+        }
     }
     
     var MaybeSearchView: some View {