Changes to embedded/os-note

• 2013-03-06 02:56:23 UTC (jserv): fix date
• 2013-02-16 04:43:29 UTC (jserv): update lecture note
• 2013-02-16 04:39:33 UTC (jserv): update lecture note
• 2013-02-16 04:35:59 UTC (jserv): update lecture note
• 2013-02-16 04:30:34 UTC (jserv): add lecture note