Create change log to document changes between versions.

changeLog.txt

@@ -0,0 +1,17 @@
+09/04/17 v1.2.3
+Finally solves the issue of Arduino IDE not correctly detecting and highlighting the keywords.
+
+09/03/17 v1.2.2
+Solves a format issue in keywords.txt that prevented keywords from being detected.
+
+08/28/17 v1.2.1
+Fix to issues 6 and 7. Not cleaning the imaginary vector after each cycle leaded to erroneous calculations and could cause buffer overflows.
+
+08/04/17 v1.2
+Fix to bug preventing the number of samples to be greater than 128. New logical limit is 32768 samples but it is bound to the RAM on the chip.
+
+05/12/17 v1.1
+Fix issue that prevented installation through the Arduino Library Manager interface.
+
+05/11/17 v1.0
+Initial commit to Arduino Library Manager.