hdf5_der

[svn-r30311] Purpose: Fix bug HDFFR-9920 cont.
trunk:
Description:
    Continued rearranging the classes to model the relationship of HDF5
    objects more accurately.  The changes included:
    - in the baseclass list of Attribute, changed "public IdComponent" to
      "public H5Location", because location sometime can be specified with
      attribute
    - moved H5A wrappers in H5Location to H5Object because H5A functions
      can't be called on attribute id
    - removed the stubs Attribute::iterateAttrs and Attribute::renameAttr
    - removed Attribute::getFileName and Attribute::flush, because
          H5Location has them
    - result of the modified partial class diagram, regarding Attribute

                                IdComponent
                                     |
                                H5Location   AbstractDs
                                /       \   /
                        H5Object     Attribute
Platforms tested:
    Linux/32 2.6 (jam)
    Linux/64 (platypus)
    Darwin (osx1010test)