Bugfix update file collision list on AJAX-updating file list in file manager.
Correct files order in file list in file manager.
Fixes #4: don't delete old backups.
Fixes #35: include into backup only users files.
Fixes #32: move 'Backups' button forward 'Parameters' button.
Fixes #36: bugfix missed files content in backups.
Fixes #34: replace SQL-dumping with export to XML.
Fixes #4: remove backups versions number from parameters.
Fixes #31: AJAX-backuping.
Fixes #33: add parameter 'Dropbox access token'.
Fixes #33: autosaving backups to Dropbox.
Correct method BackupController::getLog().
Correct calculate size of backup.
Fixes #37: script for converting old backups to new format.