Document readerir.h:GenIr class

[richardlford]

Document readerir.h:GenIr class using Doxygen markup.

[russellhadley]

@erozenfeld, is there still work to do here?

[erozenfeld]

Yes, very few methods of GenIR are properly documented.

[AndyAyersMS]

Note only the newly introduced methods need documentation, since the overrides should be documented in the base class.

We also need to reconcile the .cpp vs.h issue. As I'm working through the internals of reader.h I'll pull redundant comments from both readerir.h and readerir.cpp.

[russellhadley]

@richardlford where are we on this?

[richardlford]

@russellhadley, as @AndyAyersMS mentioned above, method overrides do not need documentation as they should be documented in the base class. However in looking at the current sources I see a number of non-override methods that do not have documentation. So I would say there is more work to do.