Both Go's standard `path` and `path/filepath` packages are too limiting to
work well for Flamenco. The former assumes Linux/POSIX paths, the latter
only works with platform-native paths. Neither can work with Windows paths
on Linux, or Linux paths on Windows.
Some parts of Flamenco had a Command consist of "name + settings", and
other parts used "type + parameters" (with the same semantics). This is
now unified to "name + parameters".
