Make debian/rules file executable
Ignore a few more packaging files
Add the ability to whitelist commands from a json file

This allows us to lock down what commands can be run from an SNS notification. This change also improves the logging output of a command, such that it can now happen live instead of waiting until the command finishes before outputting stdout and stderr.
Change commands list to dict for enhanced process configuration

You can now set arbitrary parameters for a given command run. These will be passed through to subprocess.Popen, allowing full control of the command being run.
Release 0.0.3