Update telegram_mt to latest git version

Update telegram_tl dependency to 0.1.0-alpha

Somewhat allows to fetch 'chats' (groups)

Fix import/export of sessions

Refactoring + Update deps + Supposedly allow to export/import sessions

Switch to escript + update to latest telegram_mt git version

Update telegram_mt to 0.0.1-alpha + fetch contacts + send messages

Sending messages was not tested since I'm currently banned by
`FLOOD_WAIT` ;)

Remove old useless code + Contacts

big revamp - repl

Fill the README

Allow to get contact statuses

Update telegram_tl dependency + print incoming message type

Basic supervision structure

Initial mix project