hdf5

[svn-r14167] 

Added 2 new switch flags for sort parameters of groups.

-q   sort_by [creation_order | name] 
-z    sort_order [ascending | descending ] 

Added extra parameter to dump_group of type H5_iter_order_t to control the iteration order, to be passed to H5Literate.

Note : code under development, tests not added yet and flags NOT added to usage 
Tested : windows, linux