Added the /html command

This command lets you send html messages through riot. This is
incredibly useful for doing advanced formatting not supported by
markdown and lets riot support even more html tags.

Signed-off-by: Waylon Cude <waylon.cude@finzdani.net>

src/SlashCommands.js

@@ -128,6 +128,15 @@ export const CommandMap = {
         },
         category: CommandCategories.messages,
     }),
+    html: new Command({
+        name: 'html',
+        args: '<message>',
+        description: _td('Sends a message as html, without interpreting it as markdown'),
+        runFn: function(roomId, messages) {
+            return success(MatrixClientPeg.get().sendHtmlMessage(roomId, messages, messages));
+        },
+        category: CommandCategories.messages,
+    }),
     ddg: new Command({
         name: 'ddg',
         args: '<query>',