[SVN] initial commit after SVN rebirth;

[SVN] bump to version 2.0
[UPD] now transport working with telethon 0.15.5 and sleekxmpp 1.3.2
[FIX] fixed everlasting authorization requests. if you got deauth message — ignore it, FROM subscription is enough.
[ADD] implemented roster exchange via XEP-0144
[ADD] we will send authorization request when unknown contact sent us a message
[ADD] correct presence handling for transport and users
[ADD] fixed presence spam (by default, we updating presence once for 60 seconds -- look at `status_update_interval` in mtproto.py)
[ADD] we will automatically connect to all actual sessions after transport start

config_example.py

@@ -0,0 +1,23 @@
+# Rename to config.py
+
+CONFIG = {
+    'title': 'XMPP <-> Telegram Gate',
+
+    'debug': True,
+
+    'jid': 'tlgrm.localhost',
+    'secret': 'secret',
+    'server': 'localhost',
+    'port': '8889',
+
+    'tg_api_id': '17349',  # Telegram Desktop (GitHub)
+    'tg_api_hash': '344583e45741c457fe1862106095a5eb',
+
+    'db_connect': 'db.sqlite',
+
+    'media_web_link_prefix': 'http://tlgrm.localhost/media/',
+    'media_store_path': '/var/tg4xmpp/media/',
+    'media_max_download_size': 1024 * 1024 * 100,  # in bytes
+
+    'messages_max_max_cache_size': 300,  # for quotes
+}