Advanced message formatting

[vyPal]

It would be nice to be able to include formatted text in edupage messages, stuff like headers, bold, underline, etc.

One way to implement this would be to just use markdown and implement a markdown renderer in the app, another one would be to send the message as plain text (so that people who dont use the app can still see the message normally) and then store the formatting data on the server, also maybe the app could append a short footer to the message that would just say that the message contains advanced formatting and a link to open the message in edupage2