regression is now at the top level

testcases/regression/valid/Nested1.scala

testcases/regression/valid/Nested10.scala

testcases/regression/valid/Nested11.scala

testcases/regression/valid/Nested12.scala

testcases/regression/valid/Nested13.scala

testcases/regression/valid/Nested14.scala

testcases/regression/valid/Nested2.scala

testcases/regression/valid/Nested3.scala

testcases/regression/valid/Nested4.scala

testcases/regression/valid/Nested5.scala

testcases/regression/valid/Nested6.scala

testcases/regression/valid/Nested7.scala

testcases/regression/valid/Nested8.scala

testcases/regression/valid/Nested9.scala

testcases/regression/valid/NestedVar.scala

testcases/regression/valid/Unit1.scala

testcases/regression/valid/Unit2.scala

testcases/regression/valid/While1.scala

testcases/regression/valid/While2.scala

testcases/regression/valid/While3.scala