version 0.16

fix CONCAT when field is null.

fix cascade status change of metadata after taxonomy change status

Release 0.15

Add user roles and permissions
Refactor bulk Editing to use a background process
Add total items processed in bulk edit to log file
Show only known specials columns on metadata mapping importer CSV
Fix terms carousel block order
Improve API security
Improve SQL queries efficiency

solve facet API navigation #90

- fixed elasticsearch integration, efficiency improvements, and fix s…

…earch for relationship metadata (add not sensitive case);

- fixed document thumbnail generation;
- fixed metadata loading in importer mapping list;
- fixed HTTP response code for private items;
- fixed conflict on insert multiples blocks same type in one documento;
- fixed delete buttons hidden on statics blocks in the publication;
- some adjustments to the search bar style;