Dear All:
The GitHub repository was configured as it was for expediency; ease-of-transition; and variable activity of different sub-directories. Expediency: Self explanatory given the impending Google Code shut down. Transition: We wanted to centralize some of the wikis that are very general (say, for all libraries). Variable activity: Some extensions are very static and it was convenient to store them in one place.
If you have an a more active project and you would like me to make it a separate repository, please ask, it will only take me a minute to do so.
Rob