Added a final paragraph that provides some cross-referencing to
the sections that describe how to use Wic and to the Wic
reference chapter.
Also, shortened the DOC info line.
(From yocto-docs rev: 4ba5d0119caa3696187537f5b4cc9c64ca00e205)
Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>