Add basic CLI args handling, help command
Re-structure CLI arg handling
Handle array argument values
Add -r/--require CLI argument
Cleanup code around multiple required files (thanks @d11wtq!)
Merge remote-tracking branch 'filp/feature/cli-args' into feature/cli-args
Refactor options handling into a separate class.
Merge #1
Fix usage info
Merge pull request #28 from filp/feature/cli-args

Implement #22 - CLI options, -r(equire) <file>