more documentation related fixes

Author: maitreytalware

README.md

@@ -20,8 +20,8 @@
 structures designed to make working with "relational" or "labeled" data both
 easy and intuitive. It aims to be the fundamental high-level building block for
 doing practical, **real-world** data analysis in Python. Additionally, it has
-the broader goal of becoming **the most powerful and flexible open source data
-analysis / manipulation tool available in any language**. It is already well on
+the broader goal of becoming **the most powerful and flexible open-source data
+analysis/manipulation tool available in any language**. It is already well on
 its way towards this goal.
 
 ## Table of Contents