Update README.asc

Author: cnguyen83

README.asc

@@ -30,10 +30,12 @@ Converting to PDF...
  -- PDF  output at progit.pdf
 ----
 
-You can also use the following command to generate a PDF:
+You can also use the following commands:
 
 ----
-asciidoctor-pdf progit.asc
+$ asciidoctor-pdf progit.asc
+$ asciidoctor-epub3 progit.asc
+$ asciidoctor-epub3 -a ebook-format=kf8 progit.asc
 ----
 
 Both use the `asciidoctor`, `asciidoctor-pdf` and `asciidoctor-epub` projects.