[evol] use a plugins-pecific include dir to share functions among plugins easily (closes #36)
[evol] MilkyPond config: enforce proper 'allowedServices' values
[fix] MilkyPond config: s/primary/primary_account/
[evol] synched MilkyPond shadow config with current schema
[evol] added restriction on parents for MP objects
[evol] recognize 'root' and understand it as value (but not yet as argument), clarify the full handle format, and recognize the MP root
[fix/evol] correct a bug in the item creation when handling the parent parameter, allow specifying a default parent per object, and provides a new find_by_full_handle() handy method
[evol] limit parent location/type for item creation (not yet properly integrated)
[cleanup] reorganized config
[fix] added missing start of YAML document in MP shadow config files
[evol] added default config and simplified MilkyPond shadow config (and minor other changes)
[evol/fix] fixed creation hooks call, hooks->plugins with hooks and simplified hooks, added plugin parameters in config and updated aspect/fs
[cleanup] internal rework #2
[fix/evol] corrected before delete hook and added complete hook support for objects
[fix] fixed aspects default hooks
[evol] fix and improve before hooks for aspects
[cleanup] hook_mod -> hook_modify
[evol] improve config #10 (improved object definition check)
[evol] improve config #8 (shadow selection support)