disable screenKeys in term.js

these capture ctrl-a and other keyboard shortcuts

IPython/html/static/terminal/js/terminado.js

@@ -1,41 +1,41
 define ([], function() {
     "use strict";
     function make_terminal(element, size, ws_url) {
         var ws = new WebSocket(ws_url);
         Terminal.brokenBold = true;
         var term = new Terminal({
           cols: size.cols,
           rows: size.rows,
-          screenKeys: true,
+          screenKeys: false,
           useStyle: false
         });
         ws.onopen = function(event) {
             ws.send(JSON.stringify(["set_size", size.rows, size.cols,
                                         window.innerHeight, window.innerWidth]));
             term.on('data', function(data) {
                 ws.send(JSON.stringify(['stdin', data]));
             });
             
             term.on('title', function(title) {
                 document.title = title;
             });
             
             term.open(element);
             
             ws.onmessage = function(event) {
                 var json_msg = JSON.parse(event.data);
                 switch(json_msg[0]) {
                     case "stdout":
                         term.write(json_msg[1]);
                         break;
                     case "disconnect":
                         term.write("\r\n\r\n[CLOSED]\r\n");
                         break;
                 }
             };
         };
         return {socket: ws, term: term};
     }
 
     return {make_terminal: make_terminal};
 });