[2 of 5] Move person modification options to admin section

[raul-fuentes]

Where

• Related Issue: https://github.com/AyuntamientoMadrid/transparencia/issues/173
• Related PR: https://github.com/AyuntamientoMadrid/transparencia/pull/174

What

• It moves all the edition actions (edit, new, delete, hide and unhide) from person to admin/person
• It adds and index on admin/person with the moved actions and uses the name of each person as a link to his public view (requested here)
• It adds an index for the hidden people with the unhide action
• This PR is built from the branch used in https://github.com/AyuntamientoMadrid/transparencia/pull/174
• Also javascript validations was added to the person new/edit form (using the abide component from foundation)
• It adds a field to set manually the update date

How

• At first the routes was changed from person to the admin/person section
• Then the functions from the controllers, there was added 2 scopes to the person model and record_timestamps set to false to permit the manual edition of updated at (requested here)
• At last the views was moved to the new location, there was added an index.html for the people and the logic wich creates the empty OpenStructs for the person form was moved to a helper

Screenshots

• Delete and create person

• Edit person

• Hide and unhide person

Test

• Added test to cover all the new features and changes

Deployment

• No

Warnings

• I have noticed that when a person has councillor as selected job and none party has been selected an error happens on the public councillors view, the people list is grouped by party in the controller. ¿Should I add a validation to prevent this to happen on this Issue or is better to do it in a posterior PR?
• :warning: This PR shouldn't be merged, its only the second one of five and each one will be built form the previous one. It's intended to split and clarify the total solution for the issue wich is pretty big and complicated to be in a single PR :warning:

[coveralls]

Coverage increased (+0.3%) to 91.612% when pulling d937e2a3debb7a714d4161e20ce62e97dbba77c7 on wairbut-m2c:move_person_modification_options_to_admin_section into 1e0ffeb30d1bb8db07b2daa6278927e91bda9c72 on AyuntamientoMadrid:master.

[javierm]

Merged as part of #178.