Fix some minor typos in README.rst

I was reading. I found some typos. So here are some fixes.

Change-Id: I846ca3d1e0e60d14ea596cd9546066ed0c897969

README.rst

@@ -8,7 +8,7 @@ oaktree is a gRPC interface for interacting with OpenStack clouds that is
 inherently interoperable and multi-cloud aware. It is based on the python
 shade library, which grew all of the logic needed to interact with OpenStack
 clouds and to work around differences in vendor deployment choices. Rather
-than keep all of that love in Python Library form, oaktree allows othre
+than keep all of that love in Python Library form, oaktree allows other
 languages to reap the benefits as well.
 
 oaktree is not a replacement for all of the individual project REST APIs.
@@ -52,7 +52,7 @@ Shape of the Project
 oaktree should be super simple to deploy, and completely safe for deployers
 to upgrade from master constantly. Once it's released as a 1.0, it should
 NEVER EVER EVER EVER EVER EVER EVER have a backwards incompatible change.
-There is no reason, no justification, no obessession important enough to
+There is no reason, no justification, no obsession important enough to
 inflict such pain on the user.
 
 The shade library will grow the ability to detect if a cloud has an oaktree