update to release 0.2.20
    
    - new manual pages: diskdevstat, netdevstat, scomes, and varnetload
    - updated obsolete parts in the other manual pages
    - laptop-battery-powersave profile fixes
    - support for new network device naming
    - EEE PC dynamic FSB reclocking is done dynamicly in CPU plugin (Jaroslav
      Skarvada)
    
    - changelog sync with upstream