add info about sqlite on setup page

Support having legacy `OC_Cache_FileGlobalGC` background jobs

Continuing the New User management

columns should be nullable by default

use phpseclib from 3rdparty

rename class Crypt_Blowfish to Legacy_Crypt_Blowfish

fix empty file handling option

replace $ by \$

Scrutinizer cleanup

move Help section from controls bar to sidebar

drop allowZIPdownload and maxZIPSize as options

Design details

Automatically Rotate Avatar based on exif data

add share index