Default options change for simple-ec2 config

[GavinBurris42]

Describe the feature
A concise description of the feature and desired behavior.
When using the interactive mode for simple-ec2 launch the defaults for each question are static and defined by pre-set values. These default values should instead be the defaults set in the simple-ec2.json file that are used to set the defaults in the non interactive mode.

Is the feature request related to a problem?
A description of what the problem is. For example: I'm frustrated when [...]
When using interactive mode I would want to change one or two configurations. Having the defaults represent the user set configurations will make it so they don't have to re-insert them. They can just hit enter instead of having to retype everything.

Describe alternatives you've considered
A description of any alternative solutions or features you've considered.
The flags can be used instead to skip these steps, but this also involves typing out already set defaults.

[snay2]

This is available in release v0.9.1, through the artifacts or homebrew.