Added two features: Name of delete-item is displayed - Delete torrent with/without data

control.php:
- added function deletedata to handle data-removing
- do a check of GET-variable "path" in the command-case "delete"

filebrowser.php/filebrowser.js/index.php:
- edited delete-link to fit the new showConfirm-functionality

languages/Deutsch/base.lng.php / languages/English/base.lng.php:
- added some new texts

onelineblue.js:
- added functions: getNameFromHash, getQueryVariable, linkToDirName
- showConfirm:
  -->show now the name of the torrent / Directory which will be deletedata
  -->if the item is a torrent you can now choose to delete only torrent or torrent with data
  -->some modifications on the form to fit the new behavior of the confirm-dialog

styles/onelineblue/style.css:
- some style modifications for the confirm-dialog and its buttons