Typo fixes (#127)

* Update transport_interface.py

* Update tcp.py

* Update README.md

README.md

@@ -10,7 +10,7 @@
 py-libp2p is an experimental and work-in-progress repo under heavy development. We do not yet recommend using py-libp2p in production environments.
 
 ## Sponsorship
-This project is graciously sponspored by the Ethereum Foundation through [Wave 5 of their Grants Program](https://blog.ethereum.org/2019/02/21/ethereum-foundation-grants-program-wave-5/).
+This project is graciously sponsored by the Ethereum Foundation through [Wave 5 of their Grants Program](https://blog.ethereum.org/2019/02/21/ethereum-foundation-grants-program-wave-5/).
 
 ## Maintainers
 The py-libp2p team consists of:

libp2p/transport/tcp/tcp.py

@@ -68,7 +68,7 @@ class TCP(ITransport):
         """
         dial a transport to peer listening on multiaddr
         :param multiaddr: multiaddr of peer
-        :param self_id: peer_id of the dialer (to send to receier)
+        :param self_id: peer_id of the dialer (to send to receiver)
         :param options: optional object
         :return: True if successful
         """

libp2p/transport/transport_interface.py

@@ -8,7 +8,7 @@ class ITransport(ABC):
         """
         dial a transport to peer listening on multiaddr
         :param multiaddr: multiaddr of peer
-        :param self_id: peer_id of the dialer (to send to receier)
+        :param self_id: peer_id of the dialer (to send to receiver)
         :param options: optional object
         :return: list of multiaddrs
         """