Added command to rebuild documentation after a successful build
Changed name of doxygen log file too ignore
Added function declarations for common register operations.

Functions which will perform common operations on registers in a more
abstracted and friendly way are now declared in gpiodrive.h

They are:

void             gpio_set_pin_mode(GPIO_PIN, GPIO_PIN_FUNCTION);
void             gpio_set_pin_level(GPIO_PIN, GPIO_PIN_LEVEL);
GPIO_REGISTER    gpio_get_pin_level(GPIO_PIN);
GPIO_REGISTER    gpio_get_pin_event(GPIO_PIN);
void             gpio_clear_pin_event(GPIO_PIN);
void             gpio_set_event_detect(GPIO_PIN, GPIO_PIN_EVENT);
void             gpio_clear_event_detect(GPIO_PIN, GPIO_PIN_EVENT);

 On branch master
 Changes to be committed:
	modified:   gpiodrive.h
Implemented function to set pin modes. [NEEDS TESTING]