vchoi_fork

[svn-r5963] Purpose:
    New internal feature.
Description:
    Need some way to determine the "full path" for a generic property class,
    i.e. where is this class in the class hierarchy, in relation to its parent
    class, etc.
Solution:
    Added an internal function "H5P_get_class_path" and a testing function
    "H5Pget_class_path_test" that builds the full path of a generic property
    class back to the top of its class hierarchy.

    This implementation uses '/' characters to delimit the components of the
    class path, but no special cases are currently supported for having a '/'
    character as part of the actual class name.  Should this become an issue,
    code to support (and test) it will need to be added.

Platforms tested:
    FreeBSD 4.6 (sleipnir) (not major enough to justify triple-test)