Make scope unions

closes ActionItem2830
add doc comment to ScopeTool
sub_organizations_plugin: Add related organizations block

The following improvements have been made:
  - Created action that displays sub-organization and
  super organizations of a given organization.
  - Created a block that display related organizations.
  - List mother organizations to person's membership if
  he/she is member of a sub-organization.

(ActionItem2499)
(ActionItem2825)

Signed-off-by: Arthur Del Esposte <athurmde@yahoo.com.br>
Signed-off-by: Aurélio A. Heckert <aurelio@colivre.coop.br>
Signed-off-by: Daniel Bucher <daniel.bucher88@gmail.com>
Signed-off-by: Gabriela Navarro <navarro1703@gmail.com>
Signed-off-by: Marcos Ramos <ms.ramos@outlook.com>
Add links to articles versions.

(ActionItem2822)

Signed-off-by: Daniela Feitosa
Signed-off-by: Ana Losnak <analosnak@gmail.com>
Signed-off-by: Daniel Bucher <daniel.bucher88@gmail.com>
Add new template to display versioned article

Also included revision number on cache key

Signed-off-by: Daniela Feitosa

(ActionItem2822)
Added methods to return data from specific version

(ActionItem2822)
Trying to make it prettier :)
Reverting now is working

Removed setting as versioned column
revert button is following the pattern
styling link-this-page

(ActionItem2822)
Replacing rev by version
article_versions: list of versions on a new page

- Added pagination to versions
- Treating access denied and not found

(ActionItem2822)
Checking if perrmission to view article before version
sub_organizations_plugin: Add display full visualization

Add mode that displays more information about related organizations on
the relationship page.

(ActionItem 2866)

Signed-off-by: Arthur Del Esposte <athurmde@yahoo.com.br>
Signed-off-by: Carlos Andre <carlos.andre.souza@msn.com>
Signed-off-by: Daniel Bucher <daniel.bucher88@gmail.com>
Signed-off-by: David Carlos <ddavidcarlos1392@gmail.com>
Signed-off-by: Gabriela Navarro <navarro1703@gmail.com>
Signed-off-by: Leandro Alves <leandrosustenido@gmail.com>
Signed-off-by: Luiz Matos <luizff.matos@gmail.com>
Signed-off-by: Marcos Ramos <ms.ramos@outlook.com>
po-files: add language to po files
po-pt: fix translation mistake
Merge branch 'master' of https://gitlab.com/noosfero/noosfero
Merge remote-tracking branch 'dani/AI2822-fixes' into AI2822-fixes

Conflicts:
	public/stylesheets/application.css
versioned-article-view: use variabla and alert developers about doubled verification
application-css: remove doubled style
Remove trailing whitespaces and fix identation
Merge remote-tracking branch 'danielbucher/sub_organizations_improvements' into sub_organizations_improvements