added screenshots to site-wide content tutorial

[darioalbanesi]

screenshots for side wide content

[mkoistinen]

Nice additions, can you fix this:

sphinx.errors.SphinxWarning: /home/travis/build/divio/django-cms/docs/user/tutorial/30-structure-\
content-modes.rst:47: WARNING: image file not readable: user/tutorial/images/structure-button.png

[evildmp]

@mkoistinen don't worry I will catch all errors before merging into develop.

[evildmp]

@darioalbanesi thanks, looks like just what we need.

One question: how easy is it to add a nice big title text to the header, that is superimposed on the image? It could be added in the next section (advanced styling).

[evildmp]

Will merge this in the meantime.

[darioalbanesi]

@evildmp something like this?

[evildmp]

@darioalbanesi yes, but is that text in the image - or superimposed via the CMS (the latter is what I suggest)

[darioalbanesi]

@evildmp cms of course ;) I added a style-plugin for the feature-visual and used an extra class to align the text to the center. Used H1 and a custom text-color (which is the brand-primary color)

[coveralls]

Changes Unknown when pulling 8c5117c on tutorial/side_wide_content into ** on user-tutorial**.