Remove printf testing function
Shell: create the prototype function of the watch "command"
Makefile: Fix the target "gdbauto" with the -tui argument
Block the Barometer related code
Arrange the code of the task creation
Let the watch command reading for the interruption signal
Fix the wrong barometer blocking issue
Merge branch 'watch'

Conflicts:
	program/shell/shell.c
Shell-watch :port the gui command into the watch task
Merge branch 'master' of https://github.com/shengwen1997/QuadrotorFlightControl