Add "enableLiveAutocomplete" option

This makes live autocomplete optional and is not tied to
“enableBasicAutocomplete” anymore

This also renames “onChangeAutocomplete” to “doLiveAutocomplete”

demo/kitchen-sink/demo.js

@@ -592,6 +592,7 @@ env.editSnippets = function() {
 require("ace/ext/language_tools");
 env.editor.setOptions({
     enableBasicAutocompletion: true,
+    enableLiveAutocomplete: true,
     enableSnippets: true
 });
 

lib/ace/ext/language_tools.js

@@ -115,7 +115,7 @@ var loadSnippetFile = function(id) {
     });
 };
 
-var onChangeAutocomplete = function(e) {
+var doLiveAutocomplete = function(e) {
     var editor = e.editor;
     var session = editor.getSession();
     var pos = editor.getCursorPosition();
@@ -174,16 +174,23 @@ require("../config").defineOptions(Editor.prototype, "editor", {
             if (val) {
                 this.completers = completers;
                 this.commands.addCommand(Autocomplete.startCommand);
-
-                // On each change automatically trigger the autocomplete
-                this.commands.on('afterExec', onChangeAutocomplete);
             } else {
-                this.removeListener('afterExec', onChangeAutocomplete);
                 this.commands.removeCommand(Autocomplete.startCommand);
             }
         },
         value: false
     },
+    enableLiveAutocomplete: {
+        set: function(val) {
+            if (val) {
+                // On each change automatically trigger the autocomplete
+                this.commands.on('afterExec', doLiveAutocomplete);
+            } else {
+                this.removeListener('afterExec', doLiveAutocomplete);
+            }
+        },
+        value: false
+    },
     enableSnippets: {
         set: function(val) {
             if (val) {