Add a /quote command
Pasting a multi-paragraph block of text for quoting is currently frustrating, as you can't just type "> " and then paste and hit return, because if "\n\n" happens to exist in the block, it'll fall out of quote mode.
Since we already have /code for code pastes (like HipChat), let's also go for /quote: you do "/quote <paste><enter>" and done.
The implementation would be virtually identical to /code, just replace the 4 spaces with "> "
Chris Jordan commented
To add a new quote, you simply pass it to the ! addquote command: ! addquote This is a new quote!