am f80372db: Merge "docs: update device dashboard; add historical chart" into froyo

Merge commit 'f80372dbc0f4a1b80bebfe5f5124de8d31e0996b' into gingerbread

* commit 'f80372dbc0f4a1b80bebfe5f5124de8d31e0996b':
  docs: update device dashboard; add historical chart