- drop fillThis: handle in injectStreams instead
- simplify InputParser construction (at the expense of implementation simplicity)
- split out ScopeKey/initialization parts of Setting with separate Initialize trait
+ makes Apply obsolete
+ makes the Initialize trait properly composable
+ this allowed splitting the InputParser definition into
an Initialize for parsing and one for the action
- implement test-only
- inject resolved scope
- make all constructing methods end in = for lowest precedence
- rename Scope constructing method 'apply' to 'in' to allow 'apply' to
be used on single settings as well as tuples and 'in' reads better
finish alias support
better project printing in 'projects'
completion support for 'help'
resolve URIs in ProjectRef against base URI of defining build in keys and project relations
resolve base directories and record build URI in BuildUnit
preserve relative paths in File to URI conversion for later resolution