Add analogue inputs to HAL.

Add ability to read analogue inputs on arduino and on external ADS1115 I2C modules.

platformio.ini

@@ -16,6 +16,7 @@ default_envs =
 	unowifiR2
 	nano
 src_dir = .
+include_dir = .
 
 [env]
 build_flags = -Wall -Wextra
@@ -41,7 +42,7 @@ lib_deps =
 	SPI
 monitor_speed = 115200
 monitor_flags = --echo
-build_flags = -DDIAG_IO
+build_flags = -DDIAG_IO -DDIAG_LOOPTIMES
 
 [env:mega2560-no-HAL]
 platform = atmelavr