Fixes TooTallNate#161

Changed header map to use a TreeMap with a Case Insensitive comparator, which keeps the framework in compliance with RFC2616 standard, section 4.2.

Author: shortstuffsushi

src/main/java/org/java_websocket/handshake/HandshakedataImpl1.java

@@ -2,15 +2,14 @@
 
 import java.util.Collections;
 import java.util.Iterator;
-import java.util.LinkedHashMap;
-import java.util.Locale;
+import java.util.TreeMap;
 
 public class HandshakedataImpl1 implements HandshakeBuilder {
 	private byte[] content;
-	private LinkedHashMap<String,String> map;
+	private TreeMap<String,String> map;
 
 	public HandshakedataImpl1() {
-		map = new LinkedHashMap<String,String>();
+		map = new TreeMap<String,String>( String.CASE_INSENSITIVE_ORDER );
 	}
 
 	/*public HandshakedataImpl1( Handshakedata h ) {
@@ -33,7 +32,7 @@ public Iterator<String> iterateHttpFields() {
 	@Override
 	public String getFieldValue( String name ) {
 		String s = map.get( name );
-		if( s == null ) {
+		if ( s == null ) {
 			return "";
 		}
 		return s;