Add a new configuration option

Before, when you selected the option to display only unread articles, it shows read articles if no unread article were found.
Now, this option is renamed to include information on fallback behavior and a new option is created to have the "only unread" behavior

See #551

It is missing the german translation
Load $nb/2 articles when articles are unfolded

See https://github.com/marienfressinaud/FreshRSS/issues/559
Show a message to warn about loading divided by 2

See https://github.com/marienfressinaud/FreshRSS/issues/559
Merge branch 'reading-conf' of github.com:aledeg/FreshRSS into aledeg-reading-conf
Coding style + i18n

Change "Show only unread or read if no unread" into "Adjust showing". It
is less explicit but shorter.
Merge branch 'aledeg-reading-conf' into dev
Move button to apply update outside the message
No cache for update system

See https://github.com/marienfressinaud/FreshRSS/issues/616
Test HTTP REFERER in install.php

Test is actually basic, we need to use
Minz_Request::isRefererFromSameDomain() method to improve checking
Move http referer test into lib_rss

Rename method (coding style)
Change in app/FreshRSS.php
Improve test of app/install.php
Bug purge

https://github.com/marienfressinaud/FreshRSS/issues/493
Misc minor details + a few i18n corrections

https://github.com/marienfressinaud/FreshRSS/issues/618
Style: reduce white space of line breaks in articles

Makes articles a bit more compact.
Plus a generic filter for multiple lines breaks, useful for instance in
LeMonde.fr, which uses <br /><br /><br />
https://github.com/marienfressinaud/FreshRSS/issues/618
Change color:hover for bigMark

See https://github.com/marienfressinaud/FreshRSS/issues/480
Fix a serie of undefined index (app/install.php)
Merge pull request #620 from plopoyop/dev

Ajout d'un timeout pour la notification HTML5
Add page for reset auth type [NOT WORKING]

See https://github.com/marienfressinaud/FreshRSS/issues/521
Improve reset auth system

- Add bcrypt.js in resetAuthAction()
- Rename init_loginForm() in init_crypto_form()
- Load init_crypto_form() everytime (if no #crypto-form, do nothing)
Use openNotification instead of alert (main.js)
Improve resetAuth redirections

See https://github.com/marienfressinaud/FreshRSS/issues/521