Documentation!

No idea how to make tests for this...

docs/bot_tutorial/programmatic_running.md

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+# CLI-less Running
+
+In certain environments, it is either impossible 
+to get to a console, or completely impractical. 
+Even if you are not using said environments, being 
+able to start your bot in a python file is very 
+useful for things in the config that require functions.
+
+Disco has the `util.runner` module just for this task. Just simply:
+```py
+from disco.util import runner
+
+bot = runner.bot_creator({
+    'token': 'YOUR.TOKEN.HERE',
+    'bot': {
+        'plugins': ['plugins.tutorial']}  # this can be anything
+})
+
+bot.run_forever()
+```
+
+Now you just need to `python main.py`, and the bot starts! Nice!
+
+### Custom prefixes
+
+One of the main reasons why you may want to use this method of 
+starting your bot is that now you can give functions for configuration.
+That is especially useful if, for example, you really want server-specific 
+prefixes, or prefixes based on the user. All you need to do is put
+a function which takes the message object and returns an array of strings.
+
+For example, this bot will have different prefixes for the owner vs
+a random user:
+```py
+from disco.util import runner
+
+TOKEN    = 'YOUR_TOKEN_HERE'
+OWNER_ID = 'YOUR_USER_ID_HERE'
+
+
+def prefix_getter(message):
+    if str(message.author.id) == OWNER_ID:
+        return ['@']
+    else:
+        return ['!']
+
+
+bot = runner.bot_creator({
+    'token': TOKEN,
+    'bot': {
+        'prefix_getter': prefix_getter,
+        'require_mention': False,
+        'plugins': ['plugins.tutorial']  # this can be anything
+    }
+})
+
+bot.run_forever()
+```