Merge pull request #140 from crazyproger/KT-1985

KT-1985 Creating class body in time of override/implement, if necessary

idea/testData/codeInsight/overrideImplement/emptyClassBodyFunctionMethod.kt

@@ -0,0 +1,6 @@
+// From KT-1254
+trait T {
+    fun Foo() : (String) -> Unit
+}
+
+class C : <caret>T

idea/testData/codeInsight/overrideImplement/emptyClassBodyFunctionMethod.kt.after

@@ -0,0 +1,10 @@
+// From KT-1254
+trait T {
+    fun Foo() : (String) -> Unit
+}
+
+class C : T {
+    override fun Foo(): (String) -> Unit {
+        throw UnsupportedOperationException()
+    }
+}