first batch for displaying groups in creation order
1) Added extra parameter to dump_group of type H5_index_t , to be passed to H5Literate.
When a group is tried to be displayed, an inquiry of its creation properties is made. If H5P_CRT_ORDER_TRACKED is present on the group property list then the display is made by creation order, otherwise it is made by name
2) Added a new file to h5dumpgentest that generates a file with a hierarchy of groups with creation order on and off in alternately
Note : XML code was not modified
Tested : windows, linux
