Minor buffs to rogue

Adds the Minstrel, a lightly armored duelist who uses the power of song to bolster strength and incapacitate foes. Implements 20 new abilities split across 5 ability trees and 2 additional artifacts (which form a set).

This is my first mod for ToME4, so if you encounter any bugs or balance issues, feel free to let me know!

The source code is available here: https://github.com/ArtixBot/tome4-minstrel

Minor buffs to some classes.
This is really just for my own usage, but I can't stop you if you want to download it.

Changes:
Reduce stealth cooldown 10 -> 5, changed max power 64 -> 150
Traps now last 10x as long (8 -> 80)
Traps have their cooldowns halved
Husks can be created from unique creatures (the description already makes this seem possible)
Husks don't unlearn bone shield
Aura Mastery max size +5 -> +7
Aura Mastery min decay rate 3% -> 1%
Brotherhood of Alchemist elixirs no longer get poached

Adds the Mobility Generic Tree to:
- Rogues (Locked, 1.3 mastery)
- Skirmishers (Unlocked, 1.1 mastery)

Reworks the Rogue class. /Removed the reflex defense mod because I don't agree with it. NONE of this is my original work, just tuning it to my preference; credits all go to Razakai.

Reworks the Rogue class.

Adds the Cunning/Subterfuge tree for rogues. Primarily defensive tree based around stealth.

0.2 - Added icons for the abilities (Just repurposed vanilla for now), added sound to make Honed Reflexes triggering more obvious.
0.1 release. No icons for the abilities yet and it's pretty rough, but it all works.

Adds a new Psionic class (since their numbers are few anyways) that is a combo of rouge, solipsist and mindslayer. Focus more on combat than staying in the back, but still has the capability to do so.

Adds a new Afflicted Subclass proficient in the Cursed Talent Trees Darkness, Force of Will, Gloom, Cursed Form and Dark Sustenance and the Corruption Talent Trees Vim, Doom Covenant, Black Magic and Curses. They also possess the Cunning Talent Trees Stealth and Survival. This Addon requires ASHES OF URH'ROK to be enabled in the Addons Menu. THIS ADDON DOESN'T GRANT YOU ANY FILE FROM ASHES OF URH'ROK! It's only a Subclass.

If you side with the Assassin Lord, a new zone will open up. This will be triggered the same way the Assassin Lord quest is, starting at player level 15.

Once you've cleared this area, you can come back for access to the merchant services you would've gotten if you had saved the merchant - at a substantial markup over normal cost.