Show notes in Log CLI command

Show notes in Log CLI command

Support for --no-standard-notes and --show-notes=REF options is added
to the Log command. The --show-notes option can be specified more than
once if more than one notes branch should be used for showing notes.

The notes are displayed from note branches in the order how the note
branches are specified in the command line. However, the standard note,
from the refs/notes/commits, is always displayed as first unless
the --no-standard-notes options is given.

Change-Id: I4e7940804ed9d388b625b8e8a8e25bfcf5ee15a6
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>