Fixing some documentation errors (#78)

Author: hiranya911

firebase_admin/__init__.py

@@ -47,7 +47,7 @@ def initialize_app(credential=None, options=None, name=_DEFAULT_APP_NAME):
           Google Application Default Credentials are used.
       options: A dictionary of configuration options (optional). Supported options include
           ``databaseURL``, ``storageBucket`` and ``httpTimeout``. If ``httpTimeout`` is not set,
-          HTTP connections initiated by client modules such as ``db`` will not timeout.
+          HTTP connections initiated by client modules such as ``db`` will not time out.
       name: Name of the app (optional).
 
     Returns:

firebase_admin/db.py

@@ -155,10 +155,10 @@ def get_if_changed(self, etag):
 
         Returns:
           tuple: A 3-tuple consisting of a boolean, a decoded JSON value and an ETag. If the ETag
-              specified by the caller did not match, the boolen value will be True and the JSON
-              and ETag values would reflect the corresponding values in the database. If the ETag
-              matched, the boolean value will be False and the other elements of the tuple will be
-              None.
+          specified by the caller did not match, the boolen value will be True and the JSON
+          and ETag values would reflect the corresponding values in the database. If the ETag
+          matched, the boolean value will be False and the other elements of the tuple will be
+          None.
 
         Raises:
           ValueError: If the ETag is not a string.