* Proc class
Encapsulate processes in a class, when they go out of scope, we can use the __destruct() process to make sure the process terminates.
* Fix rrdtool_last checks failing
* Don't close rrdtool in rrd_graph
Try to start rrdtool process if they haven't been started yet
Remove some extra debug output
* phpdocs added
several cleanups
should still be functioning the same
Only open one rrdtool process for graph.php
