Add live timer and tracefile count/size to list

The live timer interval is session wide where the trace file count/size
is per channel.

Fixes #642

Signed-off-by: David Goulet <dgoulet@efficios.com>
Add max-size to snapshot list output

Fixes #635

Signed-off-by: David Goulet <dgoulet@efficios.com>
Add timestamp to log

Also, the ERR() and WARN() now have the timestamp and the PID
information.

Fixes #519

Signed-off-by: David Goulet <dgoulet@efficios.com>