AI3131 - fixing bug in add image to articles, header and footer
Merge branch 'AI3131' of https://gitlab.com/arthurmde/noosfero into AI3131
Allowing directly download of images

(ActionItem3131)
Fixed migration: avoid validation on form update

(ActionItem3172)
Destroying forms when its profile is destroyed

Also added migration to remove existent forms without profile

Signed-off-by: Ana Losnak <analosnak@gmail.com>

(ActionItem3144)
Bumping version 0.47.3
product-categories-block: change the way display_options is extended

The previous way was making the constant be extended for the superclass
to.

ActionItem3188
Merge branch 'stable' of gitlab.com:noosfero/noosfero into stable
Merge branch 'stable' of https://gitlab.com/noosfero/noosfero into cirandas