vchoi_fork

[svn-r30309] Purpose: Fix bug HDFFR-9920
Description:
    Rearranged the classes to model the relationship of HDF5 objects more
    accurately.  The changes included:
    - moved CommonFG's methods to Group
    - removed CommonFG from Group's base class list
    - removed CommonFG from H5File's base class list and changed
      "public H5Location" to "public Group" in the base class list
    - CommonFG became unused
    - result of the modified partial class diagram:

                                IdComponent
                                     |
                                H5Location
                                /
                        H5Object
                           |
                        /  /  \
                DadaType Group DataSet
                          |
                        H5File
Platforms tested:
    Linux/32 2.6 (jam)
    Linux/64 (platypus)
    Darwin (osx1010test)