examples/: Add to the repository.

* Makefile.am (SUBDIRS): Add examples/
* configure.ac: Add examples/Makefile
* examples/: Add to the repository.
key-type.c: Use `publickey_free' instead of `ssh_key_free'.

* src/key-type.c (free_key_smob): Use `publickey_free' instead of
  `ssh_key_free'.
key-{type,func}.c: Fix warnings.

* src/key-type.c (free_key_smob): Fix warnings.
* src/key-func.c (guile_ssh_public_key_to_string): Likewise.
Merge branch 'master' into ssh-server-api

Conflicts:
	ChangeLog