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/f2/api-hal/api-hal-gpio.c

@@ -1,7 +1,11 @@
 #include "api-hal-gpio.h"
 
 // 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) {
     // TODO: Alternate Functions
     GPIO_InitTypeDef GPIO_InitStruct = {0};