hdf5doc

Description:
    H5Eclear1, H5Eprint1, H5Epush1, H5Eset_auto1, H5Eget_auto1, H5Ewalk1:
        Renamed from old H5Eclear, H5Eprint, H5Epush, H5Eset_auto,
        H5Eget_auto, H5Ewalk functions.
        Renamed certain corresponding structs and datatypyes.
    H5Eclear2:  Renamed from H5Eclear_stack.
        Corrected function description.
    H5Eclear1, H5Eclear2, H5Eget_current_stack:
        Deleted potentially-confusing extraneous descriptive text.
    H5Eget_current_stack:  Revised description from "registers current
        stack..." to "returns copy of current stack..."
    Some copy edits, added links, and formatting.
Tested:
    Firefox