Switch message buffers to blocking queues and update reading logic (#83)

* working on blocking queues

* my mplex and delete muxer

* progress

* dont understand error

* tests passing

* cleaning up

* working on reading messages

* implmented varint reading from stream, rewrote message reading logic

* linting error in utils fix

* Update tcp.py

* removed unused vars

* removed prints

* added doc strings

stream_muxer/mplex/utils.py

@@ -1,3 +1,6 @@
+import asyncio
+import struct
+
 def encode_uvarint(number):
     """Pack `number` into varint bytes"""
     buf = b''
@@ -23,3 +26,16 @@ def decode_uvarint(buff, index):
         index += 1
 
     return result, index + 1
+
+async def decode_uvarint_from_stream(reader):
+    shift = 0
+    result = 0
+    while True:
+        byte = await asyncio.wait_for(reader.read(1), timeout=5)
+        i = struct.unpack('>H', b'\x00' + byte)[0]
+        result |= (i & 0x7f) << shift
+        shift += 7
+        if not i & 0x80:
+            break
+
+    return result