update readme with new info re: module script execution

README.md

@@ -37,7 +37,13 @@ pip install -r requirements.txt
 # setup secrets in config file outside of git
 cp tipbot/config.example.py tipbot/config.py
 vim !$
-
-# run it
-python3 tipbot/tipbot.py
 ```
+
+## Usage
+
+There are 2 modules in this repo:
+
+- `tipbot` - the Telegram bot process
+- `admin` - management commands
+
+To use them, ensure you're in the virtualenv and run `python3 -m tipbot` or `python3 -m admin`