Fix some issues:
1. Update Readme.md
2. Messages from other support member (messages with #tsf...) are marked as read.
3. Delete TL_messagesActionLoginUnknownLocation (to avoid other members of tsupport to know your location.
4. Modified order of dialogs, now dialogs with unread messages are shown first.
5. Changes in templates: Now templates are written as %key%.
6. Delete cache when app close (to avoid great ammount of data in SD)
7. Removed gray place of "share contact info" in chat view.
8. Reload templates from default now workss in queue so not to overload UI thread
9. Remove gray place of "start secret chat" in user profile view
10. Updated some string in English and Spanish