ds18b20: Remove ICACHE_FLASH_ATTR, minor cleanup

Signed-off-by: Andrew Andrianov <andrew@ncrmnt.org>
ds18b20: Clean up formatiing

Signed-off-by: Andrew Andrianov <andrew@ncrmnt.org>
Rename test.c to main.c for the sake of sanity

Signed-off-by: Andrew Andrianov <andrew@ncrmnt.org>
Commit current work

Signed-off-by: Andrew Andrianov <andrew@ncrmnt.org>