eliminate multi-line if/else for no context case
eliminate multi-line if/else for no context case

Inspired by feedback in pull request #26
This is slightly more complicated than the suggestion
But this still preserves Python < 2.7.9 functionality
Prior to 2.7.9, context is not a valid arg to urllib2.urlopen()
So you can *not* just set it to None
Ref: https://docs.python.org/2/library/urllib2.html#urllib2.urlopen

locationlabs/ansible-vault,jhaals/ansible-vault,jhaals/ansible-vault