Go into ./gnomon/processors/ and create a new file. Within that file, define a new class.
Once you have written your class, go into:
./gnomon/processors/__init__.py
Then import your class and append this class to the variable gnomon.processors._processors. This allows gnomon to find your processor by name.
Warning
Do not name your processor with a previously used name otherwise your new processor may not be found
Be sure to add the file to the version control system:
git add YOUR_FILENAME.py
git commit -m "Added new processor YOUR_FILENAME.py"