Bump version back to dev

Author: mwaskom

seaborn/__init__.py

@@ -10,4 +10,4 @@
 from .xkcd_rgb import xkcd_rgb
 set()
 
-__version__ = "0.5.0"
+__version__ = "0.6.dev"

setup.py

@@ -22,7 +22,7 @@
 URL = 'http://stanford.edu/~mwaskom/software/seaborn/'
 LICENSE = 'BSD (3-clause)'
 DOWNLOAD_URL = 'https://github.com/mwaskom/seaborn/'
-VERSION = '0.5.0'
+VERSION = '0.6.dev'
 
 try:
     from setuptools import setup