notes: add Makefile

Signed-off-by: Micky Ching <mickyching@gmail.com>
org: add study link and latex table

Signed-off-by: Micky Ching <mickyching@gmail.com>
emacs: init emacs-notes.org

Signed-off-by: Micky Ching <mickyching@gmail.com>
notes: init README.org

Signed-off-by: Micky Ching <mickyching@gmail.com>