Do you have any suggestions for project directory structure?

[Jesse Phillips]

I'm not sure I would recommend this, but I've been using 
something like this:

  protocols
   ├── dmocks (I don't use this)
   │   └── *.d
   ├── libs
   │   └──foo
   │       └── *.d
   │   └── bar
   │       └── source
   │             └── *.d
   │
   ├── source
   │   └── protocols
   │       └── *.d

The libraries can actually have dependencies on other libraries, 
in this case bar requires foo and will expect to find ../foo