Web Applications 1.0 r8856 Try to clarify stuff around fragment parsing (this removes the ability to call the fragment parsing algorithm without a context node; I couldn't find anyone doing that, but if I missed a case please let me know)

Add a description of Web Applications 1.0 r8856 Try to clarify stuff around fragment parsing (this removes the ability to call the fragment parsing algorithm without a context node; I couldn't find anyone doing that, but if I missed a case please let me know)