Refactoring of indexController

Global view has been moved to a different action (all is not working)

See https://github.com/marienfressinaud/FreshRSS/issues/634
and https://github.com/marienfressinaud/FreshRSS/issues/655
Views are in dedicated actions + improve Context

- Seperate normal, global and rss outputs in dedicated actions (NOT WORKING YET!)
- Rewrite aside_flux and nav_menu to use Context object
- Improve Context object

See https://github.com/marienfressinaud/FreshRSS/issues/634
Update title and get parameter correctly.

See https://github.com/marienfressinaud/FreshRSS/issues/634
Finish to update context object

See See https://github.com/marienfressinaud/FreshRSS/issues/634
Entries are loaded again! It's working :)

See https://github.com/marienfressinaud/FreshRSS/issues/634
Fix a set of TODO and bugs

- Context object raises correct Exception if get is invalid
- RSS feed is well-indicated on the home page
- State is better calculated
- Add some comments

See https://github.com/marienfressinaud/FreshRSS/issues/634
Move back i18n init in FreshRSS.php
Better view mode

- Seperate view mode from default state in conf
- Load read articles if no unread articles only if view is adaptive

See https://github.com/marienfressinaud/FreshRSS/issues/634
Remove STATE_STRICT

See https://github.com/marienfressinaud/FreshRSS/issues/634
nextGet and idMax are coming back.

See https://github.com/marienfressinaud/FreshRSS/issues/634
Fix pagination

See https://github.com/marienfressinaud/FreshRSS/issues/634
Fix a bug in nextGet
Add comments to Context object.

See https://github.com/marienfressinaud/FreshRSS/issues/634
Fix some parts of aside_flux

See https://github.com/marienfressinaud/FreshRSS/issues/634
Begin fixing of Origine theme

See https://github.com/marienfressinaud/FreshRSS/issues/634
Rename aside_flux in aside_feed.
Begin to fix JS for new aside
Fix Origine theme

See https://github.com/marienfressinaud/FreshRSS/issues/634
Fix Origine theme

See https://github.com/marienfressinaud/FreshRSS/issues/634
Better tree-folder-title:hover (Origine)