Build

Added sha256 functions #420

Job	Run time
Build with PlatformIO (espgeigerhw)	1m 34s
Build with PlatformIO (espgeigerlog)	1m 40s
Build with PlatformIO (espgeigerlog_gc10next)	1m 51s
Build with PlatformIO (espgeigerlog_test)	1m 51s
Build with PlatformIO (esp32_pulse)	1m 21s
Build with PlatformIO (esp32_pulse_no_pcnt)	1m 22s
Build with PlatformIO (esp32_test)	1m 18s
Build with PlatformIO (esp32_testpulse)	1m 21s
Build with PlatformIO (esp32_test_gc10)	1m 18s
Build with PlatformIO (esp32_gc10)	1m 17s
Build with PlatformIO (esp8266_pulse)	1m 39s
Build with PlatformIO (esp8266_pulsemin)	1m 28s
Build with PlatformIO (esp8266_test)	1m 29s
Build with PlatformIO (esp8266_testpulse)	1m 31s
Build with PlatformIO (esp8266_test_gc10)	1m 40s
Build with PlatformIO (esp8266_gc10)	1m 30s
Build with PlatformIO (esp8266oled_gc10)	1m 34s
Build with PlatformIO (esp32oled_gc10)	1m 34s
Build with PlatformIO (esp8266oled_gc10next)	1m 33s
Build with PlatformIO (esp32oled_gc10next)	1m 21s
Build with PlatformIO (esp8266oled_pulse)	1m 38s
Build with PlatformIO (esp32_cajoe_iotgm)	1m 23s
	33m 13s

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