Tested `req mkd` for multiple targets (given as strings)
Referencing variables and constants works in `req mkd`
Applying fake cwd works
`mkd` request works
`req cp` request implemented in translator
Tested references in `req cp` request
`req cp` works
Updated runner and docs
Removed old tests (not used anymore)
Implemented comma-related logic, guards against invalid names and bumped version to 0.0.4