Changed the name of the get_num_bytes() function to get_num_data().

See merge request !2

# Conflicts:
#   include/can/can.h

Solved a bug in the serial library: moved the #include <asm/termbits.h> header to the source file to avoid possible conflicts with other libraries using other termios headers.

The read and write functions return 0 bytes read/written in case the device is not configured instead of throwing an exception.

# Conflicts:
#   .gitlab-ci.yml

Changed the map of data queues to use a pointer.
Added a new map for the new data events.
Both maps are updated with the add_filter and clear_filter functions.

When the communication thread catches an exception, it sets the communication object to the created state before finishing the thread.

Added a mutex unlock in the exception catch in the thread to avoid blocking when an error occurs.

Returned the thread with pthread_exit function.

Deleted scripts/debian/add_manufacturer_to_group_udev.sh