feature(polls): add depencies on collective.polls
fix: remove unused code
feature(polls): Integrate collective.polls for mobile theme
fix(widget): EnhancedTextLinesWidget js degradation

This widget is used by collective.polls. we don't want it, so here
I patch the JS to handle the case the jquery plugin is not
available.
style(image_tile_view): use picturefill

Optimize the way the image is displayed
fix(polls): remove dependency on collective.z3cform.widgets

This addon install so much JS we don't want and it use only one.
Let's get ride of it.
refactor(viewlets): move notification into separate viewlet

For this we need also to remove 'home' viewlet from the header,
so we have moved this one into section.