Added FTDI Java d2xx library download link.

Renamed / moved DlReader.java and FTDI url link to root folder.

 22.04.2016. class DlReader v1.8
             - Added support for DLogic AoA interfaces based on FTDI Vinculum II
               and AoA uFR interfaces based on FT312D chips.
             - AoA support implemented without any public methods.
 04.12.2015. class DlReader v1.7
             - Added method getNumOfDlDevices()
 03.12.2015. class DlReader v1.6
             - in ComProtocol.portWrite() from this version we use an nonblocking write()
               overloaded method from the FTDI class and we have implemented retry count
               (Consts.MAX_COMMUNICATION_BREAK_RETRIES times) on communication break. If
               number of communication break retries exceeded, raised DlReaderException have
               Consts.DL_READER_IS_NOT_CONNECTED err_code and usb device is closed. This algorithm
               solve usb otg device disconnect detection problem on the Runbo X5 and probably some
               other Android smart phones with usb otg port.
 01.12.2015. class DlReader v1.5
             - New method:
                   public synchronized boolean readerStillConnected()
                       returns true if device still connected to the system (false otherwise).
             - New Status Consts in DlReader.DlReaderException (defined in DlReader.Consts):
                   public static final int DL_READER_COMMUNICATION_BREAK = 0x50;
                       raised when there is communication problem (mostly hardware problems).
                   public static final int DL_READER_IS_NOT_CONNECTED = 0x104;
                       raised when the device is disconnected from the Android system (if device is
                       still attached to the system check cable, connectors and/or device).
 15.06.2015. class DlReader v1.3
             - Implementation of the new functionality (Sleep mode of the attached nFR device).
             - New methods:   public synchronized void enterSleepMode() throws DlReaderException, InterruptedException
                              public synchronized void leaveSleepMode() throws DlReaderException, InterruptedException
 12.05.2015. class DlReader v1.0
             - First public release.