SBT Adjustments

-Changed Framework/ScalaTestFramework to throw IllegalArgumentException when -s, -j and -b is passed in.
-Changed Framework/ScalaTestFramework to throw IllegalArgumentException when -P/-c (concurrent) is passed in.
-Fixed -C (custom reporter) not working in Framework/ScalaTestFramework problem.
-Added support of -y (chosen styles) to Framework/ScalaTestFramework.
-Added -f (FileReporter) to scalatest.scala