Implementation of a simple program that creates 20 million inodes in the
current working directory. It creates 1000 root directories, which
contain 1000 normal directories, which in turn contain 20 files each.

Signed-off-by: Andreas Rohner <andreas.rohner@gmx.net>
Add support for the definition of the number of inodes through command
line parameters and a simple usage message.

Signed-off-by: Andreas Rohner <andreas.rohner@gmx.net>