Support for embeds in .qsearch output + case

- Support for embeds in .qsearch output results
- Search can be case insensitive (changes made 011b951a29)
- Output shows keyword in lowercase as it's easier to read (line 104)
- Minor syntax cleanups

src/NadekoBot/Modules/Utility/Commands/QuoteCommands.cs

@@ -101,7 +101,7 @@ namespace NadekoBot.Modules.Utility
                     }
                     return;
                 }
-                await Context.Channel.SendMessageAsync("💬 " + keyword.toLowerInvariant(); + ":  " + keywordquote.Text.SanitizeMentions());
+                await Context.Channel.SendMessageAsync("💬 " + keyword.toLowerInvariant() + ":  " + keywordquote.Text.SanitizeMentions());
             }
 
             [NadekoCommand, Usage, Description, Aliases]