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  /** \page Page_ProgrammingApps Programming an Application into a USB AVR
   *
   *  Once you have built an application, you will need a way to program in the resulting ".HEX" file (and, if your
   *  application uses EEPROM variables with initial values, also a ".EEP" file) into your USB AVR. Normally, the
   *  reprogramming of an AVR device must be performed using a special piece of programming hardware, through one of the
   *  supported AVR programming protocols - ISP, HVSP, HVPP, JTAG, dW or PDI. This can be done through a custom programmer,
   *  a third party programmer, or an official Atmel AVR tool - for more information, see the <a>atmel.com</a> website.
   *
   *  Alternatively, you can use the bootloader. From the Atmel factory, each USB AVR comes preloaded with the Atmel
   *  DFU (Device Firmware Update) class bootloader, a small piece of AVR firmware which allows the remainder of the
   *  AVR to be programmed through a non-standard interface such as the serial USART port, SPI, or (in this case) USB.
   *  Bootloaders have the advantage of not requiring any special hardware for programming, and cannot usually be erased
   *  or broken without an external programming device. They have disadvantages however; they cannot change the fuses of
   *  the AVR (special configuration settings that control the operation of the chip itself) and a small portion of the
   *  AVR's FLASH program memory must be reserved to contain the bootloader firmware, and thus cannot be used by the
   *  loaded application.
   *
   *  If you wish to use the DFU bootloader to program in your application, refer to your DFU programmer's documentation.
   *  Atmel provides a free utility called FLIP which is USB AVR compatible, and an open source (Linux compatible)
   *  alternative exists called "dfu-programmer".
   */