pomo-{start,stop,break} commands

This workflow now supports three commands wrapped around a single "Script Filter". After typing pomo, can run one of the following 3 commands:

• pomo start: Start a pomodoro
• pomo stop: Stop the current pomodoro or break
• pomo break: Start a short break

Initial release, pomo will start a pomodoro

• Supports a single command: pomo to start a pomodoro on Tomato One