Add Licence file
Add tests

Add user-space c code to exercise the functionality of the driver.
Needed to make any future code revisions a little less painful.

Signed-off-by: Salym Senyonga <salymsash@gmail.com>
scull: Change scull magic/device number

Change scull magic number to 00x81 as k is already taken.

Signed-off-by: Salym Senyonga <salymsash@gmail.com>
test: ioctl_test: test file now works

One can now test one of scull's ioctl options

Signed-off-by: Salym Senyonga <salymsash@gmail.com>