Bandwidth per process per file in detailled view

Bandwidth per process per file in detailled view

display information for each files

Display all the currently opened files
clean the data structure
no more struct iostream
everything is now in struct processtop

[ Updated by Julien Desfossez to fit with the new babeltrace API ]

Signed-off-by: Mathieu Bain <mathieu.bain@polymtl.ca>
Signed-off-by: Julien Desfossez <julien.desfossez@efficios.com>