Fix simple typo: specifed, -> specified, (#235)

Closes #234

Author: timgates42

happybase/connection.py

@@ -43,7 +43,7 @@ class Connection(object):
     The `host` and `port` arguments specify the host name and TCP port
     of the HBase Thrift server to connect to. If omitted or ``None``,
     a connection to the default port on ``localhost`` is made. If
-    specifed, the `timeout` argument specifies the socket timeout in
+    specified, the `timeout` argument specifies the socket timeout in
     milliseconds.
 
     If `autoconnect` is `True` (the default) the connection is made