Rearrange kotlin-stdlib-js library sources

Move kotlin.* api inside kotlin directory.
Update copyright paths.

libraries/stdlib/js/runtime/Enum.kt

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2010-2016 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package kotlin
+
+public class Enum<T : Enum<T>> : Comparable<Enum<T>> {
+    @JsName("name$") private var _name: String = ""
+    @JsName("ordinal$") private var _ordinal: Int = 0
+
+    val name: String
+        get() = _name
+
+    val ordinal: Int
+        get() = _ordinal
+
+    override fun compareTo(other: Enum<T>) = ordinal.compareTo(other.ordinal)
+
+    override fun equals(other: Any?) = this === other
+
+    override fun hashCode(): Int = js("Kotlin.identityHashCode")(this)
+
+    override fun toString() = name
+
+    companion object
+}