Refactor to have AVR boards exclusively at top level of repo, match c…

…onvention of other board package repos.

.gitmodules

@@ -1,7 +0,0 @@
-[submodule "hardware/adafruit/sam"]
-	path = hardware/adafruit/samd
-	url = git@github.com:adafruit/ArduinoCore-samd.git
-[submodule "hardware/teeonardu"]
-	path = hardware/teeonardu/avr
-	url = https://github.com/adafruit/TeeOnArdu.git
-	branch = 1.6.x

README.md

@@ -1,70 +1,22 @@
 # Adafruit Arduino Boards
 
-Configuration and other support files to use Adafruit's boards like Trinket, 
+Configuration and other support files to use Adafruit's boards like Trinket,
 Pro Trinket, Gemma, Flora, and more with the Arduino IDE.  This is provided as
 a reference for modifying the Arduino IDE to support Adafruit's boards.  If you
-just want to program one of Adafruit's boards you probably want one of the 
+just want to program one of Adafruit's boards you probably want one of the
 preconfigured Arduino IDEs that Adafruit provides--see the learn system guide for
 your board for more details!
 
-These files are only compatible with the 1.6.x series of Arduino IDE and NOT the
-earlier 1.0.x series.  Starting from a fresh Arduino 1.6.x IDE install navigate
-to the Arduino IDE folder and copy in files as follows:
-
--   hardware/adafruit: This hiearchy of files should be copied into the hardware
-    folder.
+NOTE: If you want to setup the Arduino IDE to work with these boards you probably
+want to follow this guide that shows an easy method using the board manager:
+https://learn.adafruit.com/add-boards-arduino-v164/overview  This repository is
+only for manually configuring Arduino to work with Adafruit's AVR boards (and for
+building new packages for the board manager).
 
--   hardware/tools/avr/etc/avrdude.conf: This is a customized avrdude.conf that
-    should be copied directly over the hardware/tools/avr/etc/avrdude.conf file
-    in the Arduino IDE.  The modified configuration increases the delays when
-    programming the ATtiny85 used in the Gemma and Trinket boards.
-
--   drivers: This folder contains USB drivers for Windows 8, 7, and XP.  The USB
-    drivers should be installed when a Flora board is connected to the computer.
+These files are only compatible with the 1.6.x series of Arduino IDE and NOT the
+earlier 1.0.x series.  The contents of this repository should be cloned/copied
+into an Arduino/hardware/adafruit/avr folder.
 
 NOTE: Arduino IDE version 1.6.2 has a bug with supporting external cores and
 DOES NOT work with these files.  Use Arduino 1.6.3+, or an earlier version like
 1.6.1.
-
-## Easy Install Scripts
-
-Three shell scripts exist in the root that can simplify the creation of
-modified Arduino IDEs with Adafruit's boards.  The scripts are build_linux.sh,
-build_windows.sh, and build_macosx.h and they require bash, tar, zip, and unzip
-(so they should really be run on Linux or OSX, however they have only been
-tested on Linux).  Each script takes two parameters, the first it the name of
-an input file that should be the Arduino IDE download for that platform, and
-the second is the output file.
-
-For example the IDE builds Adafruit publishes were built with commands like:
-
-./build_linux.sh arduino-1.6.4-linux32.tar.xz adafruit-arduino-1.6.4-linux32.tar.xz
-
-./build_linux.sh arduino-1.6.4-linux64.tar.xz adafruit-arduino-1.6.4-linux64.tar.xz
-
-./build_windows.sh arduino-1.6.4-windows.zip adafruit-arduino-1.6.4-windows.zip
-
-./build_macosx.sh arduino-1.6.4-macosx.zip adafruit-arduino-1.6.4-macosx.zip
-
-## Running a Package Build
-
-Run the `build_package.sh` script and enter a new version:
-```
-$ git clone git@github.com:adafruit/Adafruit_Arduino_Boards.git && cd Adafruit_Arduino_Boards
-$ git submodule init && git submodule update
-$ ./build_package.sh
-AVR VERSION: 1.4.1
-building adafruit-avr-1.4.1.tar.bz2...
-SAMD VERSION: 1.0.0
-building adafruit-samd-1.0.0.tar.bz2...
-```
-
-The resulting `tar.bz2` archives will then be available in the `build/` folder along with the JSON output needed to add the new versions to the package index file in the [adafruit/arduino-board-index](https://github.com/adafruit/arduino-board-index) repo:
-
-```
-├── build
-│   ├── adafruit-avr-1.4.1.tar.bz2
-│   ├── adafruit-samd-1.0.0.tar.bz2
-│   ├── avr_package.json
-│   └── samd_package.json
-```