add option to specify the unit in ascii_graph

Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>
actually implement the with_value option

Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>
convert dev id into major,minor

Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>
remove useless code in proc-info

Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>
specify the units in the histograms

Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>