Micro edits to README and CONTRIBUTING

CONTRIBUTING.md

@@ -39,7 +39,7 @@ Each one will have to repeat the setup process documented above, including
 re-accepting the staging server cert under each profile. This is a tedious
 process, but once you are done you will be able to send messages back and forth
 between different profiles, allowing you to observe both endpoints of a
-conversation!
+conversation.
 
 ## Pull requests
 

README.md

@@ -30,7 +30,7 @@ Copyright 2014 Open Whisper Systems
 Licensed under the GPLv3: http://www.gnu.org/licenses/gpl-3.0.html
 
 
-### Developers Developers Developers Developers!
+## Developers Developers Developers Developers!
 Please see
 [CONTRIBUTING.md](https://github.com/WhisperSystems/TextSecure-Browser/blob/master/CONTRIBUTING.md)
 for setup instructions and contributor guidelines.