Add test_servo.ino
Add macros for servo pin and serial bps
Fix 'angle' => 'angular', 'minimun' => 'minimum' and 'maximun' => 'maximum'
Open serial communication and set servo to 90 degrees
Fix comment
Add function read_user_input()
Add function ask_user_if_servo_moved()
Functions in alphabetical order
Add function get_min_angular_position()
Avoid global variables
Fix bug in function get_min_angular_pos()
delay: differentiate start pos. (90 degrees) and testing movement.
Add get_max_angular_pos()
Show final info: interval and total of degrees
Fix function get_min_angular_pos()