Updated README.md

Author: piettetech

README.md

@@ -9,9 +9,8 @@
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     Scott Piette, Piette Technologies - [email protected]<br>
     Jan 18, 2014&nbsp; - Initial port to Spark Core<br>
-    Oct&nbsp; 1, 2014&nbsp; - Added DHT11/21 support, fixed timing
-    issues, enhanced examples<br>
-    Sep&nbspl 23, 2016&nbsp; - Updated for Particle and moved isrCallback
+    Oct 01, 2014&nbsp; - Added DHT11/21 support, fixed timing issues, enhanced examples<br>
+    Sep 23, 2016&nbsp; - Updated for Particle and moved isrCallback
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