doc-rst: libv4l-introduction: improve format

Fix some cross-references and improve the layout of this
page.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Mauro Carvalho Chehab 2016-07-04 19:03:49 -03:00
commit bb2ade02e8