option for plain text disk usage reporting

[solidiquis]

Additions

Added option to print disk usage info in a more traditional du type of way with the addition of file identifiers you'd expect using ls -l in POSIX systems or Get-ChildItem on Windows.

  -r, --report                     Print disk usage information in plain format without ASCII tree
      --human                      Print human-readable disk usage in report
      --file-name                  Print file-name in report as opposed to full path

Fixes

• Fixed issue where specifying a really high --scale resulted in a decimal value that implied fractional bytes.

Other changes

• Decoupled styles from FileSize display to allow for custom themes in the future as well as colorless output in the future.