2.1.20

Change-log for this release:
#492 - Default admin password not working
#509 - Password complexity
#493 - Unable to purge logs
#503 - manual insertions in Items History log not working
#494 - Logs > Administration JSON error
#491 - Applying email address to user
#441 - Attachments encryption
#459 - Turn off strict mode
#477-#452 - Fix for upgrade
#459 - Turn off strict mode
#472 - Error on line 582 index.php
#474 - Set default to checked for secure passwords
#497 - Moved GA QR code creation to administration
#487 - Off-line mode, link make the page scroll up
#533#521#528 - Installation issue
#525 - Settings.php should not be commited
#527 - Potential security bug
#485 - CVS Import on V 2.1.19 quotes problems
#544 - DataTables warning: JSON data from server could not be parsed
#547 - User search
#520 - API access
#549#550 - Server Time in footer
#539 - New feature: Simplify Items Tree
#547 - Search in Users page
#401 - Folder role inheretance on new folder
#552 - added MBstring check
#554 - Search-Page "Jump to item"-Button not working correctly
#536 - one time view page for anonymous user
#517 - New feature: Suggest items system
Fork from slimm609 - Encrypted Sessions and CSRFGuard enabled
Issues with folder creation in "personal folder"
New feature: Sub-folder inherits of parent folder