* Makefile.am: Add GPLv3+ header.
* configure.ac: Add GPLv3+ header.
* guix-jupyter-kernel.scm: Add GPLv3+ header.
* guix-jupyter-subkernel.scm: Add GPLv3+ header.
* guix-kernel/environ.scm: Add GPLv3+ header.
* guix-kernel/hmac.scm: Add GPLv3+ header.
* guix-kernel/magic.scm: Add GPLv3+ header.
* guix-kernel/tools.scm: Add GPLv3+ header.

* guix-jupyter-kernel.scm: Move from 'src/'.
* guix-jupyter-subkernel.scm: Move from 'src/'.
* guix-kernel/environ.scm: Move from 'src/'.
* guix-kernel/hmac.scm: Move from 'src/'.
* guix-kernel/magic.scm: Move from 'src/'.
* guix-kernel/tools.scm: Move from 'src/'.
* kernel.json.in: Move from 'src/kernel.json'.
  (argv): Add '@guilemoduledir@'.
* env.in: New file.
* bootstrap: New file.
* configure.ac: New file.
* guile.am: New file.
* Makefile.am: New file.
* environment.scm: New file.
* VERSION: New file.

* src/guix-kernel/environ.scm: Update functions.

* src/guix-kernel/environ.scm: Use monads.

* src/guix-kernel/environ.scm: New file.
  (all-packages): New variable.
  (store): New variable.
  (find-package): New procedure.
  (get-package-path): New procedure.
  (guile-current-version-path): New procedure.
* src/guix-jupyter-kernel.scm (start-sub-kernel): Dynamic guile path.