Add version output to CLI

[jlblcc]

It would be useful to add support for -v or --version

[stansmith907]

Sounds simple enough –

1. We were using -v as the alias for --validation. Not being able to come up with good non-v word for validation, I dropped the alias for validation.
2. I assume if version is requested, no other output would be returned? All other options are ignored?

[stansmith907]

And one more thing -

In the current CLI the input file is required. The file is part of the input parameters, not an option. To cleanly get a version it might require a new action.

Currently =>

$ mdtranslator translate filename --options

Might need something like =>

$ mdtranslator version

[jlblcc]

Might need something like =>
$ mdtranslator version

Yeah that should work fine - as long as there's a way to get it. Also need to make sure version is included in the help output.

[stansmith907]

Added as

$ mdtranslator version

Bumped version to 0.8.2