Full function-hooks for rules (implemented)

[Bulle]

What has been explained since the beginning of this post is still still somewhat applicable, with some changes. To implement one (or more) hooks you need to :
- create a shared library with the hook functions implementation. You want to separate "world" and "zone", so it means two shared libraries (in my case hero_world and hero_zone).
- add an entry in the rule_values database for each hook to activate