made a few mods to the system, disk space numbers we returned as a string when they needed to be an int. and the mem stats were added were not as useful with out some extra values which are now there.
the system now supports dumping all the network stuff from /proc/net/dev for the given device name
changes to disk_usage to have clearner python code
Merge pull request #3 from wojons/master

updates to disk stats and dump network interface