fixed typos, and made small improvements to the wording

docs/sources/examples/running_redis_service.rst

@@ -82,7 +82,7 @@ of our ``redis`` container.
     DB_PORT_6379_TCP_ADDR=172.17.0.33
     DB_PORT_6379_TCP_PROTO=tcp
 
-We can see that we've got a small list of environmental varaibles prefixed with ``DB``. 
+We can see that we've got a small list of environment variables prefixed with ``DB``.
 The ``DB`` comes from the link alias specified when we launched the container. Let's use 
 the ``DB_PORT_6379_TCP_ADDR`` variable to connect to our Redis container.
 

docs/sources/examples/running_ssh_service.rst

@@ -12,9 +12,9 @@ SSH Daemon Service
 
 **Video:**
 
-I've create a little screencast to show how to create a SSHd service
+I've created a little screencast to show how to create an SSHd service
 and connect to it. It is something like 11 minutes and not entirely
-smooth, but gives you a good idea.
+smooth, but it gives you a good idea.
 
 .. note::
    This screencast was created before Docker version 0.5.2, so the