replace jstimezonedetect by moment.tz.guess() (#139)

Closes #118

app/controllers/create/settings.js

@@ -4,7 +4,6 @@ import {
 }
 from 'ember-cp-validations';
 import moment from 'moment';
-/* global jstz */
 
 const {
   computed,
@@ -55,7 +54,7 @@ export default Controller.extend(Validations, {
             return !moment(option.get('title'), 'YYYY-MM-DD', true).isValid();
           })
         ) {
-          this.set('model.timezone', jstz.determine().name());
+          this.set('model.timezone', moment.tz.guess());
         }
 
         // save poll

app/controllers/poll.js

@@ -1,6 +1,5 @@
 import Ember from 'ember';
 import moment from 'moment';
-/* global jstz */
 
 const {
   computed,
@@ -84,7 +83,7 @@ export default Controller.extend({
    */
   timezoneDiffers: computed('model.timezone', function() {
     const modelTimezone = this.get('model.timezone');
-    return isPresent(modelTimezone) && jstz.determine().name() !== modelTimezone;
+    return isPresent(modelTimezone) && moment.tz.guess() !== modelTimezone;
   }),
 
   useLocalTimezone: false,

bower.json

@@ -4,7 +4,6 @@
     "sjcl": "~1.0.6",
     "bootstrap": "~3.3.5",
     "bootstrap-datepicker": "~1.4.0",
-    "floatThead": "^1.4.3",
-    "jstimezonedetect": "~1.0.5"
+    "floatThead": "^1.4.3"
   }
 }

ember-cli-build.js

@@ -51,7 +51,5 @@ module.exports = function(defaults) {
     ]
   });
 
-  app.import('bower_components/jstimezonedetect/jstz.js');
-
   return app.toTree(trees);
 };

tests/acceptance/view-poll-test.js

@@ -5,7 +5,6 @@ import pageParticipation from 'croodle/tests/pages/poll/participation';
 import pageEvaluation from 'croodle/tests/pages/poll/evaluation';
 import moment from 'moment';
 /* jshint proto: true */
-/* global jstz */
 
 const { run } = Ember;
 
@@ -63,7 +62,7 @@ test('view a poll with dates', function(assert) {
 
 test('view a poll with dates and times', function(assert) {
   let encryptionKey = 'abcdefghijklmnopqrstuvwxyz0123456789';
-  let timezone = jstz.determine().name();
+  let timezone = moment.tz.guess();
   let poll = server.create('poll', {
     encryptionKey,
     isDateTime: true,
@@ -92,7 +91,7 @@ test('view a poll with dates and times', function(assert) {
 
 test('view a poll while timezone differs from the one poll got created in and choose local timezone', function(assert) {
   let encryptionKey = 'abcdefghijklmnopqrstuvwxyz0123456789';
-  let timezoneUser = jstz.determine().name();
+  let timezoneUser = moment.tz.guess();
   let timezonePoll = timezoneUser !== 'America/Caracas' ? 'America/Caracas' : 'Europe/Moscow';
   let poll = server.create('poll', {
     encryptionKey,
@@ -164,7 +163,7 @@ test('view a poll while timezone differs from the one poll got created in and ch
 
 test('view a poll while timezone differs from the one poll got created in and choose poll timezone', function(assert) {
   let encryptionKey = 'abcdefghijklmnopqrstuvwxyz0123456789';
-  let timezoneUser = jstz.determine().name();
+  let timezoneUser = moment.tz.guess();
   let timezonePoll = timezoneUser !== 'America/Caracas' ? 'America/Caracas' : 'Europe/Moscow';
   let poll = server.create('poll', {
     encryptionKey,