Design Flow

TODO: Explain high level architecture of ACG

1. All layout scripts are written as classes which subclass AyarLayoutGenerator

2. Your subclass of AyarLayoutGenerator defines how the layout should be drawn in terms of parameters that you define and technology constants

3. AyarDesignManager configures details about your technology, receives parameters from the user, and runs the generator to create an output layout.

4. Talk about spec files, and why they are useful