fix setVariable

app.js

@@ -5,6 +5,9 @@ var handler = function (context) {
         .then(function (vars) {
             return context.streamFile('beep');
         })
+        .then(function (result) {
+            return context.setVariable('RECOGNITION_RESULT', 'I\'m your father, Luc');
+        })
         .then(function (result) {       
             return context.end();
         });

lib/context.js

@@ -225,7 +225,7 @@ Context.prototype.setMusic = function (musicclass) {
 };
 
 Context.prototype.setVariable = function (name, value) {
-  return this.sendCommand('SET VARIABLE ' + name + ' ' + value);
+  return this.sendCommand('SET VARIABLE ' + name + ' "' + value + '"');
 };
 
 Context.prototype.sendImage = function (image) {

test/index.js

@@ -235,8 +235,8 @@ describe('Context', function() {
 
   describe('setVariable', function() {
     it('sends correct command', function() {
-      this.context.setVariable('test', 'test');
-      expect(this.context.sent.join('')).to.eql('SET VARIABLE test test\n');
+      this.context.setVariable('test', 'test test test');
+      expect(this.context.sent.join('')).to.eql('SET VARIABLE test "test test test"\n');
     });
   });