GitLab

- Move code to src/.
- Move docs to doc/:
  + texi doc to doc/texinfo/
  + original manual pages to doc/man/
  + translated manual pages to doc/man/xx/


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@1543 35c25a1d-7b9e-4130-9fde-d3aeb78583b8