Pheosics/DFHack_spells — pull request #2 by Devduweb (2014-07-03 06:28:49+00:00)
Title: Added upgrade-skill to base_improveitem

Created a new option for improveitem: upgrade-skill.
It raises the quality of the target item using the reaction's skill and the worker's effective level.
Prevented items to upgrade out of the game's set qualities too, and other issues.