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