added section describing multiple indirection.
added section describing multiple indirection.

blastron/Octo,whoozle/Octo,JohnEarnest/Octo,whoozle/Octo,JohnEarnest/Octo,james0x0A/Octo,whoozle/Octo,JohnEarnest/Octo,JohnEarnest/Octo,blastron/Octo,whoozle/Octo,whoozle/Octo,james0x0A/Octo,JohnEarnest/Octo