Code refined.

1. Merge #5, Refine the startup signal, switch to INPUT when PULL HIGH.
2. Merge #1, Add example for using two sensors.
3. Defined Errors for return values.

simple-dht 1.0.2 released.

Fix the name for example variables.

simple-dht 1.0.1 released.

Change to C++ version.

simple-dht 1.0.0 released.

Simple DHT sensor library

1. Support DHT11.
2. Simple: Use fewer pure c function, with lots of comments.
3. Stable: Follow the DHT11 protocol strictly.
4. Fast: Support 0.5HZ or 1HZ sampling rate.