commandline :: when --help is passed show usage

Signed-off-by: BlackEagle <ike.devolder@gmail.com>
specify absolute size of recovery file data

Wrote some ugly code to facilitate #22

It works fine when the files to recover are big enough.
It does not yet work very well with very small sets.

Signed-off-by: BlackEagle <ike.devolder@gmail.com>
follow the code style

Signed-off-by: BlackEagle <ike.devolder@gmail.com>
add documentation for redundancy target size

Signed-off-by: BlackEagle <ike.devolder@gmail.com>
Merge branch 'redundancy-target-size'

* redundancy-target-size:
  add documentation for redundancy target size
  follow the code style
  specify absolute size of recovery file data

This resolves #22