* split several source files
* move base settings sources (Scope, Structure, ...) into main/settings/
* breaks cycles. In particular, setting system moved from Project to Def
- 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
KList.map -> transform
can now drop trailing 'H' from multi-Task 'mapH'
compressed Action hierarchy by merging (Flat)Map{ped,All,Failure} into (Flat)Mapped
moved most information in Info into attributes: AttributeMap to allow future changes