added support routines for V6 windows
added more V6 screen support, set_cursor in bottom window no longer throws exception
z-machine now does not throw exception on illegal cursor position anymore
updated all files to Scala 2.11.0 and newest ScalaTest
backport of V6 bug fix: screen and heights are bytes not words
Merge branch 'master' into glulx_lastscala

first step to roll back to Scala-only
reverted code to updated Scala/ScalaTest/SBT version complete