Improve GPU plugins documentation

plugins/gpu/nvidia_gpu_

@@ -22,7 +22,8 @@ This plugin uses the following configuration variables:
 
 =head2 DEFAULT CONFIGURATION
 
-The default configuration is to set "env.smiexec" to /usr/bin/nvidia-smi.
+The default configuration is to set "env.smiexec" to /usr/bin/nvidia-smi and
+assume warning and critical temperatures of 75 and 95 degrees celsius, respectively.
 
 =head2 EXAMPLE WILDCARD USAGE
 
@@ -30,6 +31,21 @@ C<ln -s /usr/share/munin/plugins/nvidia_gpu_ /etc/munin/plugins/nvidia_gpu_temp>
 
 ...will monitor the temperature of available GPUs.
 
+=head1 TODO
+
+=over 4
+
+=item *
+
+Add support for specific professional GPU features such as number of compute 
+processes, clocks, power draw, utilization, and so on.
+
+=item *
+
+Use multigraphs for multiple GPUs (http://munin-monitoring.org/wiki/MultigraphSampleOutput).
+
+=back
+
 =head1 AUTHOR
 
 Nuno Fachada
@@ -206,9 +222,5 @@ do
 	: $(( nGpusCounter = $nGpusCounter + 1 ))
 done
 
-# TODO Follow multigraph suggestion from Flameeyes to look into multigraph plugins http://munin-monitoring.org/wiki/MultigraphSampleOutput, in order to reduce the amount of round trips to get the data.
-# TODO Nvidia only: Add unsupported output options from nvidia-smi for those who have that option (how to test?). Test if they are supported and put them in suggest (or not) in case they are supported (or not)
-
-