boards/remote: added revision A and remote-common folder

boards/remote-common/Makefile

boards/remote-common/Makefile.include

boards/remote-common/dist/debug.sh

boards/remote-common/dist/flash.sh

boards/remote-common/dist/reset.sh

boards/remote-common/include/board_common.h

boards/remote-common/include/fancy_leds.h

boards/remote-common/include/periph_common.h

boards/remote-pa/Makefile

boards/remote-pa/Makefile.features

boards/remote-pa/Makefile.include

boards/remote-pa/README.md

boards/remote-pa/board.c

boards/remote-pa/include/board.h

boards/remote-pa/include/periph_conf.h

boards/remote-reva/Makefile

boards/remote-reva/Makefile.features

boards/remote-reva/Makefile.include

boards/remote-reva/README.md

boards/remote-reva/board.c