You can upload emoticons by going to https://hipchat.com/home and clicking "Emoticons" from the list of options below the "Welcome, Kelly" message near the top of the page.
You can see more detailed documentation on emoticons at https://confluence.atlassian.com/hipchat/fun-with-emoticons-744525805.html
...have mention name FirstnameLastname. Fe.: @MaartenCautreels This certainly helps to know who is being mentioned in a conversation. Imagine your colleague sends the following message...
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