Code review comment for lp:~sergiusens/goget-ubuntu-touch/clean

Looks good.

alan@deep-thought:/tmp$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sdb1 231G 33G 197G 15% /
none 4.0K 0 4.0K 0% /sys/fs/cgroup
udev 7.8G 4.0K 7.8G 1% /dev
tmpfs 1.6G 1.7M 1.6G 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 7.8G 44M 7.8G 1% /run/shm
none 100M 128K 100M 1% /run/user
/dev/sda1 224G 176G 48G 79% /home
/home/alan/.Private 224G 176G 48G 79% /home/alan
alan@deep-thought:/tmp$ ubuntu-device-flash --help
Usage:
  ubuntu-device-flash [OPTIONS]

Application Options:
      --revision= revision to flash, absolute or relative allowed
      --bootstrap bootstrap the system, do this from the bootloader
      --list-channels List available channels
      --wipe Clear all data after flashing
      --channel= Specify an alternate channel (stable)
      --device= Specify the device to flash
      --serial= Serial of the device to operate
      --server= Use a different image server (https://system-image.ubuntu.com)
      --clean-cache Cleans up cache with all downloaded bits

Help Options:
  -h, --help Show this help message

alan@deep-thought:/tmp$ ubuntu-device-flash --clean-cache
2014/03/10 17:59:27 Cleaning prevously downloaded content
alan@deep-thought:/tmp$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sdb1 231G 33G 197G 15% /
none 4.0K 0 4.0K 0% /sys/fs/cgroup
udev 7.8G 4.0K 7.8G 1% /dev
tmpfs 1.6G 1.7M 1.6G 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 7.8G 44M 7.8G 1% /run/shm
none 100M 128K 100M 1% /run/user
/dev/sda1 224G 171G 52G 77% /home
/home/alan/.Private 224G 171G 52G 77% /home/alan