FIX: sort field names
FIX: Added curly braces on ifs, and changed constant declaration
FIX: replaced return null with empty array, fixed modifiers
FIX: change modifiers, comment and useless brackets
FIX: changed loglevel to TRACE
ADD: image mime types
ADD: public to JsonResponse class.
FIX: made constant static, add curly braces to ifs
ADD: FileCrawler
ADD: Statistics folder and login credentials
ADD: Statistics class
FIX: use Statistics class and Json response
ADD: file listener (wip) and crawling, changed initialization
FIX: changed Uri validation
ADD: Statistics added to handlers, credentials check, changes in VFS initialization.
FIX: statistics is now a parameter in c'tor