Move lib/d3.keybinding.js -> util/keybinding.js

almost none of the original d3 "plugin" code remains

test/index.html

@@ -81,7 +81,6 @@
     <script src='spec/geo/vector.js'></script>
 
     <script src='spec/lib/d3.combobox.js'></script>
-    <script src='spec/lib/d3.keybinding.js'></script>
     <script src='spec/lib/locale.js'></script>
 
     <script src='spec/modes/add_point.js'></script>
@@ -138,6 +137,7 @@
     <script src='spec/ui/fields/wikipedia.js'></script>
 
     <script src='spec/util/clean_tags.js'></script>
+    <script src='spec/util/keybinding.js'></script>
     <script src='spec/util/session_mutex.js'></script>
     <script src='spec/util/suggest_names.js'></script>
     <script src='spec/util/util.js'></script>

test/spec/lib/d3.combobox.js

@@ -10,7 +10,7 @@ describe('d3.combobox', function() {
     ];
 
     function simulateKeypress(key) {
-        var keyCode = iD.lib.d3keybinding.keyCodes[key];
+        var keyCode = iD.utilKeybinding.keyCodes[key];
         var value = input.property('value');
         var start = input.property('selectionStart');
         var finis = input.property('selectionEnd');

test/spec/util/keybinding.js

@@ -1,8 +1,8 @@
-describe('d3.keybinding', function() {
+describe('utilKeybinding', function() {
     var keybinding, spy, input;
 
     beforeEach(function () {
-        keybinding = iD.lib.d3keybinding('keybinding-test');
+        keybinding = iD.utilKeybinding('keybinding-test');
         spy = sinon.spy();
         input = d3.select('body')
             .append('input');