More succubi fixes

Hi,

Here's more bugfixes, there is also a script included that display a list of powers for one creature.
The script is succubus/show-powers, it works in a reaction (LUA_HOOK_CHECK_POWERS) or for a selected unit. It uses a white list of SYN_NAME to function. I included orc and warlock spells in it.

In addition there is a few bugfixes, the changelog is included in this commit:
https://github.com/Devduweb/MDF-Dev-Version/commit/def9333ae88eda094ba58e74dfe2b3818c975a03

By the way, I updated the dfhack.init and added waterwell from the released archive. There is nothing new in dfhack.init but a typo in waterwell.lua was fixed (magma job asked for water, like water ones).

Enjoy!