Command-line interface for transcryptor

[ronaldtse]

From @dadooda

Create a robust yet customizable command-line tool for transcryptor

[ronaldtse]

Making the user stuff pre-defined values into ENV effectively makes it an interactive process.

As Transcryptor becomes more advanced, a lot of encryption-specific options might well emerge. The tool must be able to provide the user help on demand.
For the same reason, the transcryption might well be an interactive process, prompting for keys, options with reasonable defaults (“Key length [256]:”) and confirmations (“Proceed? [N]:”).

[GildedHonour]

We've decided that it'll remain a gem, thus we don't need this, correct?

[ribose-jeffreylau]

Perhaps as Rake tasks for now? Just a thought.

[ronaldtse]

I think we wanted to use a CLI as a dry-run tool since Migrations may fail.