COPYING: Add CC 4.0 by-sa legalcode

The 4.0 CC license:
   - share-alike
   - atribution needed
   - allow derivative work (even commercially)

http://creativecommons.org/licenses/by/4.0/legalcode.txt

Signed-off-by: Daiane Angolini <daiane.angolini@freescale.com>
Signed-off-by: Lucas Dutra Nunes <ldnunes@ossystems.com.br>
RN: Add CC license to footer

Add Creative Commons license to be show in footer.
The CC license:
 - share-alike
 - atribution needed
 - allow derivative work (even commercially)

http://creativecommons.org/licenses/by/4.0/legalcode

Also disable the default "Copyright:" to be shown on footer.

Signed-off-by: Daiane Angolini <daiane.angolini@freescale.com>
Signed-off-by: Lucas Dutra Nunes <ldnunes@ossystems.com.br>
RN: footer styling

The Creative Commons license styling on the footer is ugly. This change
alters the HTML slightly and centers the text.

Signed-off-by: Lucas Dutra Nunes <ldnunes@ossystems.com.br>
user guide: add new download section

Signed-off-by: Lucas Dutra Nunes <ldnunes@ossystems.com.br>
user-guide: first build work in progress

Signed-off-by: Lucas Dutra Nunes <ldnunes@ossystems.com.br>
user-guide: finished first-build task

Signed-off-by: Lucas Dutra Nunes <ldnunes@ossystems.com.br>
user-guide: respect 80 columns in the source code

Signed-off-by: Lucas Dutra Nunes <ldnunes@ossystems.com.br>
user-guide: add build-result page

Signed-off-by: Lucas Dutra Nunes <ldnunes@ossystems.com.br>
UG: 80 column fix and better wording of a paragraph

Signed-off-by: Lucas Dutra Nunes <ldnunes@ossystems.com.br>
UG: fix code-blocks with invalid banch substitutions

Unfortunatelly SphinxDocs still doesn't do nested directives, so it
can't add a code block with a replacement token in it. So it has to be
hardcoded, for now.

Signed-off-by: Lucas Dutra Nunes <ldnunes@ossystems.com.br>
UG: fix wrong codeblock call in first build

Signed-off-by: Lucas Dutra Nunes <ldnunes@ossystems.com.br>