Deprecate some non-standard and obsolete types and fields.

See:
* https://developer.mozilla.org/en-US/docs/Web/HTML/Element/bgsound
* https://msdn.microsoft.com/en-us/library/windows/apps/hh965347.aspx
* https://developer.mozilla.org/en-US/docs/Web/API/window/setImmediate
* https://developer.mozilla.org/en-US/docs/Web/API/Window/clearImmediate
* https://developer.mozilla.org/en/docs/Web/API/Event/srcElement
* https://msdn.microsoft.com/en-us/library/hh869721(v=vs.85).aspx
* https://www.w3.org/TR/html5/obsolete.html
* https://developer.mozilla.org/en-US/docs/Web/API/HTMLFontElement
* https://developer.mozilla.org/en-US/docs/Web/API/HTMLBaseFontElement
* https://developer.mozilla.org/en-US/docs/Web/API/HTMLHeadElement
* https://developer.mozilla.org/en-US/docs/Web/HTML/Element/dir
* https://developer.mozilla.org/en-US/docs/Web/API/AnimationEvent/initAnimationEvent
* https://developer.mozilla.org/en-US/docs/Web/API/HTMLFrameSetElement
* https://developer.mozilla.org/en-US/docs/Web/HTML/Element/frame
* https://developer.mozilla.org/en/docs/Web/API/HTMLTableCellElement
* https://developer.mozilla.org/en-US/docs/Web/API/HTMLTableRowElement
* https://developer.mozilla.org/en-US/docs/Web/API/HTMLTableColElement
* https://developer.mozilla.org/en-US/docs/Web/API/HTMLDivElement
* https://developer.mozilla.org/en-US/docs/Web/API/HTMLHRElement
* https://developer.mozilla.org/en-US/docs/Web/API/HTMLHeadingElement
* https://developer.mozilla.org/en-US/docs/Web/API/HTMLTableElement
* https://developer.mozilla.org/en-US/docs/Web/API/HTMLParagraphElement
* https://developer.mozilla.org/en-US/docs/Web/API/HTMLTableCaptionElement
* https://developer.mozilla.org/en-US/docs/Web/API/HTMLImageElement
* https://developer.mozilla.org/en-US/docs/Web/API/Document/applets
* https://developer.mozilla.org/en-US/docs/Web/API/HTMLAreaElement
* https://developer.mozilla.org/en-US/docs/Web/API/HTMLIFrameElement
* https://msdn.microsoft.com/en-us/library/ff521069(v=vs.85).aspx
* https://developer.mozilla.org/en-US/docs/Web/API/HTMLTableSectionElement
* https://developer.mozilla.org/en-US/docs/Web/API/HTMLAnchorElement
* https://developer.mozilla.org/en-US/docs/Web/API/HTMLParamElement
* https://developer.mozilla.org/en-US/docs/Web/API/HTMLPreElement
* https://developer.mozilla.org/en-US/docs/Web/API/HTMLBRElement
* https://developer.mozilla.org/en-US/docs/Web/API/HTMLObjectElement
* https://dom.spec.whatwg.org/#dom-traversal-changes
* https://dom.spec.whatwg.org/#nodeiterator
* https://dom.spec.whatwg.org/#treewalker
* https://dom.spec.whatwg.org/#htmlcollection

Author: danielnixon

src/main/scala/org/scalajs/dom/html.scala

@@ -5,12 +5,15 @@ package org.scalajs.dom
  */
 object html {
   type Anchor = raw.HTMLAnchorElement
+  @deprecated("Obsolete.", "HTML 5")
   type Applet = raw.HTMLAppletElement
   type Audio = raw.HTMLAudioElement
   type Area = raw.HTMLAreaElement
   type AreasCollection = raw.HTMLAreasCollection
   type Base = raw.HTMLBaseElement
+  @deprecated("Obsolete.", "DOM Level 2")
   type BaseFont = raw.HTMLBaseFontElement
+  @deprecated("Non standard.", "forever")
   type BGSound = raw.HTMLBGSoundElement
   type BlockElement = raw.HTMLBlockElement
   type Body = raw.HTMLBodyElement
@@ -20,6 +23,7 @@ object html {
   type Collection = raw.HTMLCollection
   type DataList = raw.HTMLDataListElement
   type DD = raw.HTMLDDElement
+  @deprecated("Obsolete.", "HTML 4")
   type Directory = raw.HTMLDirectoryElement
   type Div = raw.HTMLDivElement
   type DList = raw.HTMLDListElement
@@ -28,9 +32,12 @@ object html {
   type Element = raw.HTMLElement
   type Embed = raw.HTMLEmbedElement
   type FieldSet = raw.HTMLFieldSetElement
+  @deprecated("Obsolete.", "HTML 4.01")
   type Font = raw.HTMLFontElement
   type Form = raw.HTMLFormElement
+  @deprecated("Obsolete.", "HTML 5")
   type Frame = raw.HTMLFrameElement
+  @deprecated("Obsolete.", "HTML 5")
   type FrameSet = raw.HTMLFrameSetElement
   type Head = raw.HTMLHeadElement
   type Heading = raw.HTMLHeadingElement
@@ -39,18 +46,21 @@ object html {
   type IFrame = raw.HTMLIFrameElement
   type Image = raw.HTMLImageElement
   type Input = raw.HTMLInputElement
+  @deprecated("Obsolete.", "HTML 4.01")
   type IsIndex = raw.HTMLIsIndexElement
   type Label = raw.HTMLLabelElement
   type Legend = raw.HTMLLegendElement
   type LI = raw.HTMLLIElement
   type Link = raw.HTMLLinkElement
   type Map = raw.HTMLMapElement
+  @deprecated("Obsolete.", "HTML 5")
   type Marquee = raw.HTMLMarqueeElement
   type Media = raw.HTMLMediaElement
   @inline def Media = raw.HTMLMediaElement
   type Menu = raw.HTMLMenuElement
   type Meta = raw.HTMLMetaElement
   type Mod = raw.HTMLModElement
+  @deprecated("Obsolete.", "HTML 3.2")
   type NextIdElement = raw.HTMLNextIdElement
   type Object = raw.HTMLObjectElement
   type OList = raw.HTMLOListElement