Merge branch 'master' of https://github.com/PX4/Firmware

.gitignore

apps/ChangeLog.txt

apps/Kconfig

apps/Makefile

apps/README.txt

apps/drivers/device/cdev.cpp

apps/drivers/device/device.h

apps/examples/Make.defs

apps/examples/README.txt

apps/examples/adc/Kconfig

apps/examples/adc/adc_main.c

apps/examples/buttons/Kconfig

apps/examples/buttons/buttons_main.c

apps/examples/poll/net_listener.c

apps/examples/poll/net_reader.c

apps/nshlib/Kconfig

apps/nshlib/nsh.h

apps/nshlib/nsh_console.c

apps/nshlib/nsh_console.h

apps/nshlib/nsh_parse.c