Sagittarius extensions

Sagittarius has its own extension libraries because even R6RS is huge however I know it is not sufficient to write practical program. To support to write it, Sagittarius provides some useful libraries.

1. (sagittarius) - builtin library
2. (sagittarius control) - control library
3. (sagittarius ffi) - Foreign Function Interface
4. (sagittarius filewatch) - Monitoring filesystem
5. (sagittarius io) - Extra IO library
6. Sagittarius MOP
7. (sagittarius object) - Convenient refs and coercion procedures
8. (sagittarius process) - Process library
9. (sagittarius pty) - Pseudo Terminal
10. (sagittarius reader) - reader macro library
11. (sagittarius record) - Extra record inspection library
12. (sagittarius regex) - regular expression library
13. (sagittarius socket) - socket library
14. (sagittarius threads) - Thread
15. (sagittarius timezone) - Timezone
16. (sagittarius debug) - Debugging support
17. (sagittarius generators) - Generators
18. Cryptographic libraries
19. (sagittarius atomic) - Atomic operation
20. (sagittarius pam) - Privileged Access Module