Added gitignore file. Added sensor selection to DHT config for DHT11/… (#152)

* Added gitignore file. Added sensor selection to DHT config for DHT11/21/22 sensors. DHT22 used a default to ensure backwards compatibility.

* Removed quotes to fix compliation error.

* Moved local ignored file from .gitignore to .git/info/exclude per request. Removed .gitignore.

ZsensorDHT.ino

@@ -31,7 +31,7 @@
 #include <DHT.h>
 #include <DHT_U.h>
 
-DHT dht(DHT_RECEIVER_PIN,DHT22); 
+DHT dht(DHT_RECEIVER_PIN,DHT_SENSOR_TYPE); 
 
 //Time used to wait for an interval before resending temp and hum
 unsigned long timedht = 0;