Please upgrade to 2.2 here.
The 2.0 and 2.1 branches are no longer being updated.
Developers docs now available at wiki
I added all available developers documentation to
[link removed by Lincoln]
Slightly improved formatting in some places.
Also wiki have link to generated documentation that is also available.
few days ago I also added Git installation for dummies. I hope to expant it soon.
If you want to add information to wiki, send me PM to get edit password.