Version 1.1.0 support reading DHT from faster/slower processors automatically

Major change to DHT reading algorithm to be resilient to changes in the CPU speed. The length of a 0 or 1 bit pulse is now compared against the length of the known 50 microsecond low pulse before the bit. This allows the comparison between a 0 or 1 bit to happen without any dependency on a cycle count or other value that depends on the CPU speed.