Merge pull request #450 from wallabag/dev

1.5.0
Merge pull request #468 from wallabag/dev

1.5.1
Merge pull request #469 from wallabag/dev

version number 1.5.1
Merge pull request #481 from wallabag/dev

1.5.2
Changed text to clarify import process.
Merge pull request #535 from bobmaerten/clarify-import-process

Changed config section to clarify import process.
a lot of enhancements related to tags: tags list is now sorted, shows number of articles, autocomplete added according to #477, #542
Merge pull request #544 from mariroz/feature-tags-autocomplete

a lot of enhancements related to tags: tags list is now sorted, shows number of articles, autocomplete added according to #477, #542
fix of conflict of s shortcat and entering s in input fields
Merge pull request #549 from mariroz/fix-tagform-and-shortcat-toggle-savelinkform-conflict

fix of conflict of s shortcat and entering s in input fields
feature #505 - it is now possible to add link from bagged article (TODO: redev it to ajax action). Some enhancements to "save a link" popup div
saving link form now sends ajax request, article view is now justified
Merge pull request #557 from mariroz/feature-add-link-inside-article-issue-505

saving link form now sends ajax request, article view is now justified (issue #554)
[fix] new import section in old themes #559
[add] remove import file in CACHE when import is over
[fix] in RSS, link to original article
acc
Merge remote-tracking branches 'upstream/dev' and 'origin/master' into dev
Update brazilian translation
Correct README.md