First version release!

Currently added commands:

apod <date?>: Get Astronomy Picture of the Day! You can add a date parameter to retrieve APOD from a specific day. Without a date parameter, the current day's APOD will be shown.
image <query>: Find an image from NASA's library.
iss: Get the current location of the International Space Station.
neo <date?>: Get Near Earth Objects! You can add a date parameter to retrieve NEO information from a specific day. Without a date parameter, the current day's NEO information will be shown.
people: Get the current people in space, sorted by spacecraft!
black_hole <number>: Delete a specified number of messages from the current channel.
space: Display all available commands.

All of these commands are the latest slash commands!