update root doc page with new package contents and version info

Author: bjornregnell

src/rootdoc.txt

@@ -10,15 +10,17 @@ This is the documentation of the `introprog` Scala library with beginner-friendl
 
 - [[introprog.Dialog `introprog.Dialog`]] for user interaction with standard GUI dialogs.
 
+- [[introprog.BlockGame `introprog.BlockGame`]] an abstract class to inherited by games using block graphics. 
+
 - [[introprog.examples `introprog.examples`]] with code examples demonstrating how to use this library.
 
 == How to use this library with `sbt` ==
 
 If you have [[https://www.scala-sbt.org/ `sbt`]] installed then you can put this text in a file called `build.sbt`
 
 {{{
-scalaVersion := "2.12.6"
-libraryDependencies += "se.lth.cs" %% "introprog" % "1.0.0"
+scalaVersion := "2.12.7"
+libraryDependencies += "se.lth.cs" %% "introprog" % "1.1.0"
 }}}
 
 When you run `sbt` in terminal the introprog lib is automatically downloaded and made available on your classpath.