title: Python version mismatch error while configuring the RBTools on mac osx
body: <p>I was trying to configure the RBTools on mac os but i am facing an issue with setting up the repo. 
  This is the error am getting.</p>
  
  <pre><code>ImportError: Python minor version mismatch: The Mercurial extension modules were compiled with Python 2.7.5, but Mercurial is currently using Python with sys.hexversion=33949936: Python 2.6.8 (unknown, Mar  9 2014, 22:16:00) \n', '[GCC 4.2.1 Compatible Apple LLVM 5.0 (clang-500.0.68)]\n', ' at: /usr/bin/python\n'
  </code></pre>
  
  <p>I have installed RBTools v0.7.4 with python version 2.6.8 and i have python version 2.7.5 as well.</p>
  
  <p>This is the complete traceback   <a href="http://pastie.org/10332044" rel="nofollow">http://pastie.org/10332044</a></p>
  
  <p>Am getting this error when i try to run the rbt setup-repo.</p>
  
  <p>Any help on this would be of great help am struck with this from past one week.</p>