* minor bugfixes

* added wisdom training method setting to allow selecting the wisdom impact on the mercs training

Old wisdom settings can be selected from the new menu by selecting the "easy" option.

* fixed wrong magazine skill gain

* updated fpr game version 1.5 compatibility

* updated the bonus XP gain range.

The old values felt way to cheaty, so I had to adjust them. New range is now between 0% and 10% selectable in the mod options.

* add level XP gain on sector operation completion
* add level XP gain on getting a skill point in combat
* add option to select the amount of gained level bonus XP

* add "Book Skills Gain" option

* add "Harder Training XP Curve" option
* add "Natural Skills Gain" option

* fidex bug with incorrect resource cost calculation for read books operation

* added sector operation to read a book for one merc at a time, to slowly gain wisdom