[evol] use a plugins-pecific include dir to share functions among plugins easily (closes #36)
[licence] copyright updated (or added when missing)
[cleanup] reorganized config
[cleanup] includes reorganization
[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
[cleanup] internal rework #1
[fix] aspect hooks loading was broken, and moved file loading into the Config class
[cleanup] Shadow load_object() -> add_object() for consistency
[evol] improve config #14 (validate global and shadow config, and removed shadowwalker's stuff from the general classes)
[evol] improve config #13 (reorganized config/schema loading/validating, transform Controler into Shadow, and began reworking things to get a real Shadow view)