Document the --version option

app/main.cpp

@@ -58,6 +58,7 @@ int main(int argc, char *argv[])
         cout << "  -p|--profile <prof> Run cool-retro-term with the given profile." << '\n';
         cout << "  -h|--help           Print this help." << '\n';
         cout << "  --verbose           Print additional information such as profiles and settings." << '\n';
+        cout << "  -v|--version        Print the program name and version." << '\n';
         return 0;
     }
 

packaging/appdata/cool-retro-term.appdata.xml

@@ -16,11 +16,11 @@
   <screenshots>
     <screenshot type="default">
       <caption>Default amber look</caption>
-      <image width="1022" height="791">https://i.imgur.com/NUfvnlu.png</image>
+      <image width="1022" height="791">https://camo.githubusercontent.com/2443e662e95733ba6ae331f391f6ec036d1ee7fd/687474703a2f2f692e696d6775722e636f6d2f4e5566766e6c752e706e67</image>
     </screenshot>
     <screenshot>
       <caption>Apple II look</caption>
-      <image width="1024" height="796">https://i.imgur.com/MMmM6Ht.png</image>
+      <image width="1024" height="796">https://camo.githubusercontent.com/44a19842d532555c7b02bf6b4b4684add9edf18c/687474703a2f2f692e696d6775722e636f6d2f4d4d6d4d3648742e706e67</image>
     </screenshot>
   </screenshots>