Clarify supported Python versions.

README.md

@@ -63,7 +63,7 @@ INSTALLATION
 
 ### REQUIREMENTS
 
--   Python v2.6+ except v3.2
+-   Python v2.6+ or Python 3.3+
 -   Supported shells:
     -   bash v4.0+
     -   zsh

docs/install.md

@@ -2,7 +2,7 @@
 
 ### REQUIREMENTS
 
-- Python v2.6+ except v3.2
+- Python v2.6+ or Python 3.3+
 - Supported shells:
     - bash v4.0+
     - zsh