Implement removeRange, and update some documentation on the list interface.

compiler/lib/implementation/array.js

Index: compiler/lib/implementation/array.js
===================================================================
--- compiler/lib/implementation/array.js	(revision 394)
+++ compiler/lib/implementation/array.js	(working copy)
@@ -4,13 +4,13 @@
 
 function native_ArrayFactory__new(typeToken, length) {
   return RTT.setTypeInfo(
-      new Array(length), 
+      new Array(length),
       Array.$lookupRTT(RTT.getTypeInfo(typeToken).typeArgs));
 }
 
 function native_ListFactory__new(typeToken, length) {
   return RTT.setTypeInfo(
-      new Array(length), 
+      new Array(length),
       Array.$lookupRTT(RTT.getTypeInfo(typeToken).typeArgs));
 }
 
@@ -40,3 +40,7 @@
   }
   native__ArrayJsUtil__throwIndexOutOfRangeException(index);
 }
+
+function native_ObjectArray__splice(start, length) {
+  this.splice(start, length);
+}