How to make an Addon

Okay, to create an Addon, just create a folder in the addons/ folder.

Then, put the maps/, sound/, lua/, or whatever crap you have inside it.

Then, in the folder of your addon, create the addoninfo.txt file.

"AddonInfo"
{
    "name"        "Super Great Addon"
    "description" "Adds cool maps and cool sounds and cool stuff"
}

Here's the example of it.

After you've created the file, just restart your game and if it mounts the addon, you're ready to publish it.