FR: Support MarkdownV2 in Telegram messages.

[jimz011]

I have been using Redbot for some time now and it is really great, especially for use with Slack and Telegram. However I found that sending it as html or markdown is not an option (I even tried to do it in a function). It will send the message fine, but it won't parse it as markdownv2 or html. This feature does work well with other Telegram bots (though, they aren't as good and intuitive as RedBot is).

Would it be possible to add the feature to use markdownV2 with Telegram?