Update README

README.md

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 # tiny-tune
-Plays Arduino tunes with minimal memory consumption. Allows for other tasks to be executed simultaneously.
+This is a sample program that plays a tune on an Arduino. The program has been optimized to consume 
+as little SRAM (variable memory) as possible for long melodies. Furthermore, additional code can
+be executed while the tune is played.
+
+In order to run the program, compile and upload the following files to your Arduino:
+- tiny-tune.ino
+- tunes.ino
+- pitches.h
+- libraries/ArduinoThread (library by Ivan Seidel)
+
+Use playTune() to start playing the tune.
+Use cancelTune() to stop playing the tune.
+Edit getTuneData() in tunes.ino to change the sample tune or add your own tunes.