Note on 32-bit Python and updated URLs

1. Added a note that 32-bit Python should be used 
2. Updated URLs for both 32-bit and 64-bit Python to current versions for Python 3.3
3. Specified Python 3.3.5 as the latest 3.3 bugfix release
4. Added Visual C++ 2010 Express
Merge pull request #50 from rippler/patch-5

Note on 32-bit Python and updated URLs