Moving the avr-rss2 platform examples to the global examples

location as suggested by the maintainers.

examples/avr-rss2/ipv6/rpl-border-router/README.ETHERNET.md

@@ -0,0 +1,66 @@
+Document version: 2015-12-29
+
+HOWTO connect the Microchip enc28j60 module
+===========================================
+
+It's possible to to add Ethernet to most microcontrollers having a SPI inter-
+face. In the Atmel world the SPI pins are used for the ISP programming. Usually 
+a 6-pin header. Named MOSI, MISO, SCK, CS (Chup Select), Vcc, GND
+
+One popular Ethernet chip is Microchip ENC28J60. It been used for quite some 
+time and is easy to program and are also supported by many platforms and 
+projects. Contiki has files under:
+
+Most focus fon AVR platforms. The SPI is used by Atmel ISP-progammings
+interface. In addition to those pins you to selects a pin for chip
+select (CS).
+
+dev/enc28j60/
+The low-level SPI drives is platform or rather CPU-specific. The avr-rss2
+platform adds the low-level drivers for Atmel.
+
+platform/avr-rss2/enc28j60_avr.[ch]
+This should be usable on most 8-bit avr platforms.
+
+The power consumption might be a problem. The enc28j60 consumes 160mA at 3.3V 
+when transmitting. The LDO (voltage reg. LP2950) on the mote can only handle 
+100mA. So external power is needed. Below is a description of a prototype.
+ 
+Used components:
+----------------
+Externel power supply 5V.
+Small breadboard
+DC-jack 
+Voltage Reg. LCP1700 3.3V
+Capacitor 4.7uF
+enc28j60 (From Ebay)
+Pin-headers
+Cables   2x5 (enc28j60)  2x3 SPI (AtMega node) 
+
+Used colors:
+Black GND
+Red VCC 3.3V
+Yellow SCK
+Green MISO
+White MOSI
+Blue CS (Chip select)
+
+SPI (Connector view)
+--------------------
+GREEN  YELLOW   NC     
+RED    WHITE    BLACK  
+
+CS is connected to external temp sensor middle pin. Consequently the
+external temp sensor can not be used in this application.
+ 
+Pictures
+--------
+![Module] ( http://www.radio-sensors.com/pictures/enc28j60.jpg)
+![Connector] (http://www.radio-sensors.com/pictures/enc28c60-cable.jpg)
+
+
+References
+-----------
+
+
+