Add initial stubs for HTML Document and Element nodes

https://dom.spec.whatwg.org/#interface-document
https://dom.spec.whatwg.org/#interface-element

HTMLKit/HTMLDocument.h

@@ -0,0 +1,27 @@
+//
+//  HTMLDocument.h
+//  HTMLKit
+//
+//  Created by Iska on 25/02/15.
+//  Copyright (c) 2015 BrainCookie. All rights reserved.
+//
+
+#import "HTMLNode.h"
+#import "HTMLDocumentType.h"
+
+typedef NS_ENUM(short, HTMLQuirksMode)
+{
+	HTMLQuirksModeNoQuirks,
+	HTMLQuirksModeQuirks,
+	HTMLQuirksModeLimitedQuirks
+};
+
+@interface HTMLDocument : HTMLNode
+
+@property (nonatomic, strong) HTMLDocumentType *documentType;
+
+@property (nonatomic, assign) HTMLQuirksMode quirksMode;
+
+@property (nonatomic, copy, readonly) NSString *compatMode;
+
+@end

HTMLKit/HTMLDocument.m

@@ -0,0 +1,13 @@
+//
+//  HTMLDocument.m
+//  HTMLKit
+//
+//  Created by Iska on 25/02/15.
+//  Copyright (c) 2015 BrainCookie. All rights reserved.
+//
+
+#import "HTMLDocument.h"
+
+@implementation HTMLDocument
+
+@end

HTMLKit/HTMLElement.h

@@ -8,11 +8,16 @@
 
 #import <Foundation/Foundation.h>
 #import "HTMLNamespaces.h"
+#import "HTMLNode.h"
 
-@interface HTMLElement : NSObject
+@interface HTMLElement : HTMLNode
 
-@property (nonatomic, strong, readonly) NSString *tagName;
 @property (nonatomic, assign, readonly) HTMLNamespace namespace;
-@property (nonatomic, strong, readonly) id parentNode;
+
+@property (nonatomic, copy, readonly) NSString *tagName;
+
+@property (nonatomic, copy)	NSString *id;
+
+@property (nonatomic, copy)	NSString *className;
 
 @end

HTMLKit/HTMLElement.m

@@ -10,4 +10,24 @@
 
 @implementation HTMLElement
 
+- (instancetype)init
+{
+	return [self initWithTagName:nil];
+}
+
+- (instancetype)initWithTagName:(NSString *)tagName
+{
+	self = [super initWithName:tagName type:HTMLNodeElement];
+	if (self) {
+		_tagName = tagName;
+	}
+	return self;
+}
+
+- (NSString *)textContent
+{
+#warning Implement Traversing
+	return nil;
+}
+
 @end