Add the license list repository as a submodule

Signed-off-by: Vlad Velici <vlad.velici@gmail.com>
Add script to get all the licences into one file. Close #27

It currently uses the files excluding:
"README.md" and "Updating the SPDX licenses.txt"

Signed-off-by: Vlad Velici <vlad.velici@gmail.com>
Process the licence list file code.

Signed-off-by: Vlad Velici <vlad.velici@gmail.com>