Bump version to 0.3.0

Bump version to 0.2.4

Sanitize user input using Shellwords.escape and bump patch number

Bump patch number

Bump version to 0.2.1 for argument validation bug fix

Restructured gem

* Moved files around
* Changed how modules are required
* Auto-generate version info from GemInfo
* Bumped version number to 0.2.0

Added rgpg command-line driver

Incremented version number to 0.1.0.

Introduced gemspec