* Rewrite/simplify the retreival of block path which is the base of all other info.
  !! Hopfully this didn't break to much !!
* Use udevadm to get all availible info and then retreive what we need
  by grepping the output in get_udev_info().
* Remove the use for expr - use internal bash functionality '$[ ... ]'.
* Remove the use for hdparm - use get_udev_info() to get serial instead.
* Remove the use for stat - use 'ls -ln' instead.
* Use 'grep -E' instead of 'egrep'. Should be more portable.
* Catch 'xxxxMB' and convert to GB.
* Rename some variables to better indicate what they actually are.