Initial
Show mail list
XOAUTH2 IMAP authorization
Using 'inbox' module instead of 'node-imap'. Code cleaning
Code cleaning
package.json cleaning
List view of messages
Save emails to databse. Download only new emails
Message model UID fix
Refactoring
View message body
Refactoring. Aggregate senders
Get messages by sender
 - JSON API
 - Quick and dirty client-side demo
 - Fix problems with IMAP connection timeout
 - Save message bodies to DB
 - Log saved messages to Redis
 - Iframe to show mail body
 - Few visual additions