1.5.2

* Security fix: if content contained some JS, wallabad displayed it. For example ```<img src=# onerror=alert(1) />``` Now, content is parsed by HTML Purifier. 
* "Save a link" is now available in the menu. Thank you @mariroz
* "Mark all as read" is available for all themes. Thank you @mariroz
* Full-Text RSS included as a script instead of file_get_contents call. Thank you @Faless
* Baggy theme embed webfont, we have no link with google servers. Thank you @nsteinmetz
* Message in install screen to prevent user when wallabag is already installed. 
* Tags display is now correct, no more duplicates. Thank you @mariroz
* Pagination if necessary when you are viewing tagged articles. Thank you @mariroz
* Import from Pocket now import tags too. Thank you @arnaudmm
* On config screen, themes are sorted alphabetically. 
* Link on footer was unclickable. 
* Added Slovene language
* Languages are well displayed on config page, no more "en_EN.utf8" :/ #wtf