fix: sanitize filename first when retrieving unique filename
refactoring of file processing models (File, FileUpload, Image, ImageUpload)
added server errors tracking using GA
updated BootstrapRenderer
updated MyAppForm::addUpload & MyFileUpload for nette2.1dev
updated CallbackPanel
fixed circular reference for user services (User, Users, Authenticator, Authorizator, ...)
updated debug panels usage
updated namespaces for nette 2.1dev
updated datepicker to be language-specific
updated Login DI to use generated factories using interfaces
replaced $container->createFoo() by $container->createServiceFoo()
removed deprecated $cols & $rows from form text inputs
updated MySelectBox
fixed default value for acl create role
updated resetForm to set values to NULL instead of ''
extension registration moved from bootstrap to config.neon
added explanation for Callback Panel why it cannot be added via config
inject* methods replaced by @inject phpDoc
minor acl role/resources/assertions refactoring