There is now a wiki setup on the Blendercam github site. Its in its infancy and needs a lot of work to make it useful. Don't be afraid to add/edit the wiki to improve it. Don't worry about how the pages are organized, overtime we will organize it. Create a new page if you have something that does not fit in with the existing pages.
You will have to register on Github in order to be able to edit the wiki.
The panel on the right shows the existing pages that have content.
I started work on Blendercam Panel descriptions but its far from complete.
There is also a page on how to use the most recent blendercam from github with a daily build of Blender.