Added README.typeQueries and references to it.
Merge pull request #542 from vasslitvinov/add-README.typeQueries

Added README.typeQueries and references to it,
to document the isXxx functions added in #212.

Brad and I decided not to document these functions properly in Standard_Modules.tex - to save the effort. We expect that Standard_Modules.tex will be replaced with chapeldocs soon.

Added references this README to doc/release/README and Standard_Modules.tex.