move first as5013 test to xmega subdirectory

as5013-test/xmega/as5013-test-interior.png

as5013-test/xmega/as5013-test-layout.png

as5013-test/xmega/as5013-test-traces.png

as5013-test/xmega/as5013-test.c

as5013-test/xmega/as5013-test.ko

as5013-test/xmega/as5013-test.make

as5013-test/xmega/fixture-plate.dxf

as5013-test/xmega/serial.h

as5013-test/xmega/testing.jpg

as5013-test/xmega/testing2.jpg

as5013-test/xmega/twi_master_driver.c

as5013-test/xmega/twi_master_driver.h