Introduce PointerEvent-related definitions

* Resolves https://youtrack.jetbrains.com/issue/KT-23932
 * Backed by review https://upsource.jetbrains.com/kotlin/branch/KT-23932-POINTER-EVENT-FROM-REMOTE-IDL

libraries/tools/idl2k/src/main/kotlin/config.kt

@@ -24,6 +24,8 @@ val urls = listOf(
         "http://www.w3.org/TR/geometry-1/" to "org.w3c.dom",
         "http://www.w3.org/TR/cssom-view/" to "org.w3c.dom",
         "http://www.w3.org/TR/uievents/" to "org.w3c.dom.events",
+        "http://www.w3.org/TR/pointerevents/" to "org.w3c.dom.pointerevents",
+
         "https://drafts.csswg.org/cssom/" to "org.w3c.dom.css",
         "http://www.w3.org/TR/DOM-Parsing/" to "org.w3c.dom.parsing",
         "https://raw.githubusercontent.com/whatwg/url/master/url.html" to "org.w3c.dom.url",

libraries/tools/idl2k/src/main/kotlin/dl/download.kt

@@ -49,15 +49,18 @@ fun main(args: Array<String>) {
             w.appendln()
             w.appendln()
 
-            e.value.forEach { pair ->
-                val (url) = pair
+            e.value.forEach { (url) ->
                 println("Loading $url...")
 
                 w.appendln("// Downloaded from $url")
-                if (url.endsWith(".idl")) {
-                    w.appendln(URL(url).readText())
-                } else {
-                    extractIDLText(url, w)
+                val content = fetch(url)
+
+                if (content != null) {
+                    if (url.endsWith(".idl")) {
+                        w.appendln(content)
+                    } else {
+                        extractIDLText(content, w)
+                    }
                 }
             }
 
@@ -66,9 +69,18 @@ fun main(args: Array<String>) {
     }
 }
 
-private fun extractIDLText(url: String, out: Appendable) {
-    //    val soup = Jsoup.connect(url).validateTLSCertificates(false).ignoreHttpErrors(true).get()
-    val soup = Jsoup.parse(URL(url).readText())
+private fun fetch(url: String): String? {
+    try {
+        return URL(url).readText()
+    } catch (e: Exception) {
+        println("failed to download ${url}, if it's not a local problem, revisit the list of downloaded entities")
+        e.printStackTrace()
+        return null
+    }
+}
+
+private fun extractIDLText(rawContent: String, out: Appendable) {
+    val soup = Jsoup.parse(rawContent)
     fun append(it : Element) {
         if (!it.tag().preserveWhitespace()) {
             return append(Element(Tag.valueOf("pre"), it.baseUri()).appendChild(it))