closes #7061

closes #7050

See http://guides.rubyonrails.org/security.html#cross-site-request-forgery-csrf

closes #7042

closes #7049

* Adds a new metadata helper and methods to PostPresenter to have metas on post pages.

* Adds tests to post controller to check correctness of metas

* Add methods to PersonPresenter to have metas on profile pages

* Correct meta data helper test

* Update PersonPresenter, add test to PeopleController

* Creates TagPresenter. Display tag metas on tag index page

* Updata meta data helper spec

* Not displaying bio as the description meta on profile page for now. Privacy concerns to be cleared.

* Set meta info as hashes in presenters

* Move original hardcoded metas info to config/defaults.yml

* metas_tags include by default the general metas, update views

* Update code style, clean views

* Renames TagPresenter StreamTagPresenter, updates TagController spec

* Add a default_metas entry to diaspora.yml.example

* Align metas hash in presenters, refactor meta data helper

* Use bio as description meta if user has a public profile

* Rename StreamTagPresenter to TagStreamPresenter

DRY

fix #6989

In #6603 hovercards were activated for logged out users, but they only
worked for local people. Hovercards on remote-people are important to
get the diaspora-id to search the person on the local pod, if you don't
know who it is.

fix #6857

also display message if the user has no invitations left and refactored
InvitationsController spec and remove unused message parameter

otherwise the counter goes into negative ;)

also  reset all negative counters

Fixes #5116

Fixed:
* wrong url
* broken navigation
* broken design
after saving the user settings

Fixes #5847

Updates introduce usage of client-side aspect dropdown rendering

And remove the note_html property from the model.

Updates introduce support for preloading contacts to Gon in order
to support client-side rendering of aspect membership dropdown box.

in order to support adding new aspect to a dropdown without full
page reload

* Fix issue #6847

Send a second message to remote recipients with conversation-author
as salmon author if the conversation-author is local.

The first dispatch will fail on old pods. New pods will ignore the
second message, if the guid already exist.

this creates inconsistent states, if you remove the block in the future

move it to Diaspora::Federation::Entities and use it in some tests, but most of the tests can be removed later.