074_person_name: added comment
core lib update
profile: major rework

1. moved profile module into portage3 namespace
2. rename file of the module (lib/portage/profile{s => }.rb)
3. fixed include in main module
lib/portage/mask.rb
lib/portage/atom.rb
lib/portage/package
db update
update profiles tasks (15*)
161_profile_masks
17{1,2}_profile_use_force_mask_[local_]flags