Version 2.3.8

Version 2.3.8 is on git to fix the previously reported composite disk graph double counting.
Thanks to Jon for sending me his diskstats and devices files so I could track this down.

Changes:
Handle dynamic disk major numbers for dm and mdp virtual devices and don't
add their data to the composite disk.

Disk panel labels configurable - probably mostly useful for user labeling
of virtual disks.

Use wrap bytes instead of discarding data when cumulative chart data overflows.

Pavel Reznicek patch: Theme changes key changed to shift pageup/pagedown.

Ville Skytta patch: indentation cleanup and os_release() bugfix.

-- 
Bill Wilson <[email protected]>