Pointed references to random.cat to use their aws api
Added details about custom and unicode emojis to how to add a reaction
Added watching example to presence changing
Added new fetch methods to specific model FAQ
Change `parse_message_delete_bulk` to not dispatch individual
`message_delete` events, and instead `bulk_message_delete`. Also make
`raw_bulk_message` delete and `raw_message_delete` have message
objects attached.
Fixes#1807
VexsandRapptz