Update README.md

README.md

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 ##How to use
 ###Sample data
-* The Sample A and Sample B: sample inputs (available data is csv formatted numerical array).
-* Run button; it runs three statistical tests(F-test, t-test, and U-test) with two given sample(Sample A and Sample B),  
+* The "Sample A" and "Sample B": sample inputs (available data is csv formatted numerical array).
+* "Run" button; it runs three statistical tests(F-test, t-test, and U-test) with two given sample(Sample A and Sample B),  
   and outputs the test result.
-* Reset button; it clears the results by Run button.
-* 
+* "Reset" button; it clears the test results by "Run" button.
+* "Output as email" button; it saves the test results by "Run" button as email to given address.
 
 ##Library list
 * statDist.js (Yuji SODE,2016): the Artistic License or the GPL v1 or later; https://github.com/YujiSODE/statDist