Add AWS utility functions from fmcv
Merge pull request #82 from kyptin/cf-aws-util-functions

Add AWS utility functions from fmcv
Avoid dict comprehensions

They are not compatible with Python 2.6.
Specify positional params in format'd strings

...so that Python 2.6 won't balk at them.
Avoid `subprocess.check_output`

...because it's not available with Python 2.6.