fix multithread logic in template app, update gpio HAL (#250)

* fix multithread logic
* more buffer for dallas id string
* update apps to use new logic
* delay_us small speedup
* add consant qualifier to gpio records and some core api
* fix some apps to use simpler method of getting gpio record
* fix ibutton app, stupid stack problem

firmware/targets/local/api-hal/api-hal-gpio.h

@@ -40,10 +40,14 @@ typedef struct {
 } GpioPin;
 
 // init GPIO
-void hal_gpio_init(GpioPin* gpio, GpioMode mode, GpioPull pull, GpioSpeed speed);
+void hal_gpio_init(
+    const GpioPin* gpio,
+    const GpioMode mode,
+    const GpioPull pull,
+    const GpioSpeed speed);
 
 // write value to GPIO, false = LOW, true = HIGH
-void hal_gpio_write(GpioPin* gpio, bool state);
+void hal_gpio_write(const GpioPin* gpio, const bool state);
 
 // read value from GPIO, false = LOW, true = HIGH
 bool hal_gpio_read(const GpioPin* gpio);