contrib/jwrapper: Retrieves existing extern classes using grep

Signed-off-by: Frédéric Vachon <fredvac@gmail.com>
contrib/jwrapper: Added basic UI

Signed-off-by: Frédéric Vachon <fredvac@gmail.com>
contrib/jwrapper: Auto-generate licence

Signed-off-by: Frédéric Vachon <fredvac@gmail.com>
contrib/jwrapper: Added README

Signed-off-by: Frédéric Vachon <fredvac@gmail.com>
contrib/jwrapper: Added jwrapper.res to sav

Signed-off-by: Frédéric Vachon <fredvac@gmail.com>
Merge: jwrapper: New features added

This may be considered as the first release of jwrapper. Here's a list of the new implemented features since the last PR:
* Grep into `lib/android` to retrieve already wrapped classes
* Auto-generate licence
* Basic user interface added
* Choice between :
  * Auto-wrap unknown types
  * Comment methods containing unknown types

Pull-Request: #641
Reviewed-by: Alexis Laferrière <alexis.laf@xymus.net>
Reviewed-by: Jean Privat <jean@pryen.org>
Reviewed-by: Lucas Bajolet <r4pass@hotmail.com>