Merge branch 'master' of https://github.com/qmk/qmk_firmware

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+/** \file
+ *
+ *  This file contains special DoxyGen information for the generation of the main page and other special
+ *  documentation pages. It is not a project source file.
+ */
+
+/** \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".
+ */